- Open Access
Evaluating the implementation of the SWITCH® school wellness intervention and capacity-building process through multiple methods
International Journal of Behavioral Nutrition and Physical Activity volume 17, Article number: 162 (2020)
School wellness programming is important for promoting healthy lifestyles and academic achievement in youth; however, research is needed on methods that can help schools implement and sustain such programs on their own. The purpose of this study was to investigate factors within and outside the school environment that influenced school capacity for implementation and potential sustainability of wellness programming.
As part of the School Wellness Integration Targeting Child Health (SWITCH®) intervention, elementary school wellness teams (N = 30) were guided through a capacity-building process focused on promoting the adoption of healthy lifestyle behaviors in students. Data on implementation were collected through three standardized surveys and interviews (pre-mid-post) and a post-implementation interview. Indicators of organizational capacity were assessed using the School Wellness Readiness Assessment (SWRA). Paired t-tests were run to assess changes in implementation (classroom, physical education, and lunchroom settings), capacity, and stakeholder engagement over time. One-way analysis of variance (ANOVA) tests were run to examine how implementation of best practices (low, moderate, high) explained differences in capacity gains. Qualitative data were analyzed through inductive and deductive analysis, following the Consolidated Framework for Implementation Research (CFIR).
Paired t-tests showed non-significant increases in school and setting-specific capacity and implementation of SWITCH best practices over time, in addition to a consistent level of engagement from key stakeholders. ANOVA results revealed non-significant associations between implementation group and gains in school capacity (F [2, 24] = 1.63; p = .21), class capacity (F [2, 24]=0.20 p = .82), lunchroom capacity (F [2, 24]=0.29; p = .78), and physical education (F [2, 24]=1.45; p = .25). Qualitative data demonstrated that factors within the outer setting (i.e., engaging community partners) facilitated programming. Inner-setting factors (i.e., relationships with administration and staff) influenced implementation. Implementation process themes (e.g., planning, adaptation of resources to meet school capacity/needs, and engaging students as leaders) were cited as key facilitators. Schools discussed factors affecting sustainability, such as school culture and knowledge of school wellness policy.
The results from this implementation study document the importance of allowing schools to adapt programming to meet their local needs, and highlight the strengths of measuring multiple implementation outcomes. Increased support is needed for schools regarding the formation and improvement of wellness policies as a means to enhance sustainability over time.
School-based wellness programming provides an important opportunity to promote children’s physical activity and nutrition behavior [1, 2]. However, factors within and outside the school environment have been found to hinder adoption, implementation, and sustainability of comprehensive interventions [3,4,5,6]. To advance research on school wellness programming, it is important to test approaches aimed at building capacity for more effective school wellness programming.
Within the United States, several key legislative actions related to school-based obesity prevention have been enacted in the last two decades. First, the Child Nutrition and WIC re-authorization act of 2004  mandated that by 2006 schools participating in the National School Lunch Program must develop a wellness committee and a written wellness policy incorporating strategies for promoting physical activity and healthy nutrition behaviors, and community and staff involvement. Second, in 2010 the United States Department of Agriculture (USDA) enacted the Healthy Hunger Free Kids Act  which stipulates expectations for school nutrition standards pertaining to breakfast and lunches and wellness policy enhancement, increasing the emphasis on schools as health-promoting environments. Finally, in 2016 the USDA introduced the Final Rule mandate  which stipulated that school wellness policies must be evaluated every 3 years in regard to the level of policy implementation, and progress to be reported to the school community and stakeholders. These policies mark major advances in school wellness programming potential, yet little is known about how schools are trained and prepared to fulfil such responsibilities in the United States. Further, few initiatives and programs have been developed to provide schools with professional development on building and sustaining programming, highlighting gaps between policy and practice [10, 11].
The School Wellness Integration Targeting Child Health (SWITCH®) intervention adopts a capacity-building process whereby schools are provided with training and professional development on school wellness programming and evaluation practices [12, 13]. Through such a process, school wellness teams (SWT) are provided with autonomy to implement program quality elements (i.e., implementation strategies) and setting-specific best practices (using implementation materials) to the degree that works best for their school and context.
Foundational research on the original Switch intervention [14, 15] demonstrated the potential of multi-ecological-level programming for improving children’s intake of fruits and vegetables, increasing physical activity, and decreasing non-educational screen time. Subsequent work based on an established implementation framework [16, 17] developed and refined the SWITCH implementation process to enable schools to carry out programming more independently . A recent evaluation has documented the specific value of the online platform for building self-monitoring skills in youth ; however, there is considerable variability in the use of this platform by the schools as well as their adherence to the setting-specific best practices. Given that the online website, implementation of modules, and integration of resources throughout the school setting represent the key components of SWITCH, the degree to which these are implemented likely contributes to differential outcomes from SWITCH. Further research is needed to understand the contextual factors that influence implementation and subsequent capacity change from the SWITCH intervention. Such information is critical to improving training and implementation materials and providing ongoing support to schools as a means to promote comprehensive school wellness environments.
The dissemination and implementation (D&I) literature offers many approaches and frameworks for understanding implementation with the Consolidated Framework for Implementation Research (CFIR) being one of the most comprehensive and widely used frameworks [19, 20]. The CFIR has predominantly been used in clinical research , but recent applications to school-based health interventions have shown value for evaluating implementation of programming [3, 22]. Although CFIR has been used to frame studies testing the implementation of evidence-based programs in schools, a recent systematic review by Cassar et al.  highlighted that use has been primarily for interpreting findings, as opposed to guiding study design. The systematic use of the CFIR provides unique advantages to understand stakeholders’ perceptions of capacity and their perceptions related to sustaining programming over time. Sustainability of evidence-based programming has been cited as a key issue in the D&I literature  - to advance research on sustainability, the authors specifically advocated for the use of ‘methodologically stronger primary research, informed by theory’, (p. 26) . The use of both quantitative and qualitative methods offers advantages for triangulating implementation data, and for identifying areas of dissonance between more objective indicators of implementation . Accordingly, the specific aims of this study were to 1) examine relations between organizational capacity and implementation of recommended SWITCH best practices, and 2) evaluate factors influencing implementation using a multi-method approach.
We conducted an implementation study using both qualitative and quantitative data to investigate the implementation processes, outcomes, and the factors that influence implementation of SWITCH quality elements and best practices through the lens of the CFIR model . We sought to test implementation of SWITCH as a “real world trial,” one step prior to full dissemination in the Scale-Up Continuum of evidence-based interventions . Consistent with this continuum, the purpose of this implementation evaluation was to “determine the extent to which the intervention is delivered to the target population as planned” (p.3) . The adoption of CFIR and the use of multi-method approach provides advantages for studying the complex relationships influencing school wellness programming. Approval was obtained from the Institutional Review Board (#14–651) at Iowa State University to conduct the project. Consent was obtained from all adult participants through school agreements prior to implementation, and through verbal consent scripts at the beginning of each interview. To ensure quality in reporting of implementation outcomes and qualitative data, we have adhered to the Standards for Reporting Implementation Studies (StaRI) and the Consolidated criteria for reporting qualitative research (COREQ) checklists in this manuscript [25, 26].
Participants and training procedures
The 2018–2019 iteration of SWITCH involved 30 elementary schools from 22 counties (of 99) in the state of Iowa, located in the Midwestern portion of the United States. Summary data on school characteristics are provided in Table 1. Schools were recruited/enrolled in the summer/fall of 2018 through communication/solicitation and were instructed to form a school wellness team (SWT) of three (or more) school staff members and assign a leader. Training was offered from September to December of 2018 and consisted of a series of preparatory webinars and a required one-day conference at the University campus. The composition of SWT representation for the sample and information on SWT leaders is illustrated in Table 2. The purpose of the webinars was to orient SWTs to SWITCH quality elements and best practices and their importance/rationale as a means to enhance student health behavior (shown in Table 3). This provided SWT with an opportunity to learn the history of SWITCH, the key facets of programming, and all the resources available for implementation. The purpose of the in-person conference was to provide SWT with rich professional development on module implementation, assessing their school wellness environment for strengths and areas for improvement, and strategic planning.
Moreover, in the 2018–2019 iteration, a key focus for implementation was to establish reciprocal and collaborative relationships with a national youth development organization: 4-H  through the Iowa 4-H Extension and Outreach program . Extension staff, that facilitated county-level 4-H programming, were encouraged to attend the conference and meet with SWT from schools in their county to learn about SWITCH and plan programming collectively. The 4-H Extension staff facilitated goal setting through provision of ideas and support, and worked with SWT to develop an action plan for the 12-week implementation phase and beyond. A separate evaluation of 4-H Extension engagement and program satisfaction was conducted; it highlighted the ways in which Extension staff felt that SWITCH provided them with an opportunity to reach more schools and youth in their counties, indicating a mutually beneficial relationship for both extension/4-H staff and schools SWT .
School capacity measurement
The SWITCH evaluation has incorporated indicators to capture elements of organizational capacity or readiness as well as environmental characteristics . A specific tool called the School Wellness Readiness Assessment (SWRA)  was developed based on previous conceptions of organizational readiness . It consists of questions to assess readiness in the overall school setting, as well as classroom, lunchroom, and physical education settings. SWT were asked to respond on a 5-point Likert scale ranging from “Strongly disagree” to “Strongly agree”. The measure was developed through multiple rounds of review by experts in school wellness and had documented utility in predicting engagement with the launch of SWITCH in the previous iteration of SWITCH (unpublished observations). Each construct has high internal consistency; classroom α = .85; PE: α = .85; lunchroom: α = .94; and school organization: α = .93 . The SWRA was administered prior to implementation (week 0) and again at the end of implementation (week 12+). The tool can be found in Additional file 1: Appendix A.
Checkpoint surveys were administered halfway (week 6) and toward the end (week 12) of implementation to assess the degree to which SWT were able to implement the SWITCH program. Wellness teams were asked to report the degree to which they adhered to the five quality elements established to guide schools (see Table 3). They also reported on setting-specific implementation by reporting on adherence to similar best practice guidelines recommended for the classroom, lunchroom, and physical education settings. Both sets of items were coded into three levels (Not Yet/Partially/Fully; scored as 1, 2, or 3, respectively) but were combined as a global indicator for the present study to capture information on Implementation Process (Planning, Executing) factors in the CFIR. Previous research supported the importance of an individual quality element (use of the web-based tracker) as a predictor of changes in youth outcomes  so this provides some documentation for the overall utility of these items. Additional questions in the checkpoint survey asked about the perceived engagement and awareness of school stakeholders (i.e., classroom teachers, administration, food service staff – 1 = low; 2 = moderate; 3 = high) to gain a sense of how the SWT are networked within their school community and the degree of collaboration within and outside the building.
Checkpoint calls were utilized before and throughout the implementation phase to connect with schools and facilitate goal setting/monitoring. These calls were introduced in the 2017–18 cycle of SWITCH as an implementation strategy designed to facilitate adoption and implementation of programming by helping SWT hold themselves and their colleagues accountable during the 12-week phase. They were maintained as a key element of the training and implementation process in the 2018–19 cycle as the research team was able to engage 4-H Extension staff to conduct these capacity-building calls . Checkpoint calls were scheduled before implementation (week 0), half way (week 5/6), and toward the end (11/12) of the active implementation phase. Each call was grounded in motivational interviewing (MI) principles [32, 33], whereby researchers (n = 2; masters/PhD-level education) and trained 4-H Extension (all with bachelor’s or master’s degree) staff posed questions to SWT with the goal of guiding them to a strategy/solution that works best for their team capacity and school environment. Field notes were recorded during the first interview as a means to document goals set by the SWT and to help hold schools accountable for their progress . In doing so, support to schools was individualized and specific to their needs as an implementation site. Schools were asked to allot ~ 30 min before/during/after the school day for these conversations. All schools had met the researchers and Extension staff at the training conference in the fall prior to spring implementation, and were aware of the supporting role of Extension staff prior to involvement. Questions asked in these calls pertained to the Innovation Characteristics (Adaptability, Complexity, Cost), Implementation Process (Planning, Engaging, Executing), Inner Setting (all constructs), and Outer Setting (Cosmopolitanism, Peer Pressure) factors which attributed to SWT’s ability to implement SWITCH and develop comprehensive programming . All calls were audio recorded and transcribed. All interview guides can be found in Additional file 2: Appendix B.
After implementation concluded (post-week 12), a semi-formal interview was conducted with SWT by an independent contractor, highly-skilled in qualitative methods, to gather reflective input and feedback on the program and the ways in which schools were able to perceive their ability to sustain wellness programming after formal implementation ended. The interview guide was designed to address how training and support from the SWITCH research team/Extension, as well as factors within/outside the school environment, affected SWT ability to implement the program. An example question was: “How would you describe the level of support you received from your county youth Extension officer(s)? To what degree did they facilitate SWITCH implementation?”. Interview data provided valuable insights that could not be gleaned from checkpoint calls, as SWT reflected on all 12 weeks and provided objective feedback on the program . Interviews lasted between 10 and 27 min, conducted through phone call or online video conferencing software (i.e., Zoom), were audio recorded, and transcribed verbatim. All SWT were sent an email from the SWITCH research team and Extension officers to schedule checkpoint calls; final interviews were scheduled with an external research contractor through email contact. Figure 1 illustrates the number of interviews/checkpoint calls conducted at each time point, showing an even distribution between new and returning schools. School data were collected from only those SWT that responded to invitations for checkpoint calls and interviews. Not all SWT participated in interviews.
All quantitative data were entered into Statistical Analysis Software (SAS; Version 9.6, Raleigh NC), processed, and tested for normality of distribution. Checkpoint survey and SWRA data were merged with school demographic data and sorted by time, providing two time points (pre- and post-SWITCH) for each school. Given the dearth of school-based D&I research to date, guidelines for how to analyze implementation scores from multiple indicators was drawn from public health and clinical fields [35, 36]. The five quality elements of SWITCH: SWT weekly meetings; using the tracking software in classrooms; integration of curriculum in each school setting; engaging youth as leaders; and communicating with parents have all shown to be important implementation steps to facilitate school-wide change and/or subsequent youth behavioral outcomes [12,13,14, 18]. Since these practices hold ecological validity for outcomes of the SWITCH intervention, they were combined into a global implementation score. To establish a composite measure of implementation, an average quality element score (5 elements; scored 1–3) was added to average scores for each of the setting best practices (lunch, physical education, classroom; scored 1–3), yielding a score between 2 and 6. Subsequent tertile splits were computed to separate high versus moderate and low implementing schools; such method has strong support and utility in modeling research especially when a linear relationship cannot be assumed among variables . Scores were calculated for overall SWRA scores, and changes in capacity in each school setting (post-pre) were computed to determine capacity change over time.
Pearson bivariate correlations were conducted to examine relations between changes in implementation over time and changes in school-level wellness capacity. In addition, paired t-tests were conducted to examine changes in setting-specific capacity over time. Finally, a series of one-way ANOVAs were run to understand the differences between implementation (low, moderate, high) and subsequent gains in capacity (setting specific and overall). Statistical significance was assumed at α < 0.05.
Qualitative data collection yielded 90 transcripts across the four time points, requiring a rigorous and systematic procedure; thus, analysis followed constant comparison techniques with two coders . Based on this approach, data were analyzed first through open coding, followed by axial coding while maintaining an inductive approach, before deductive analysis was conducted through the lens of CFIR domains. This provided a clearer understanding of how factors related to the intervention and those within and outside the school environment affected implementation and SWT capacity to achieve systems change in their school community. The purpose of axial coding was to test the un-coded data against the initial codebook for agreement and to make refinements to themes [39, 40]. A separate subsample of transcripts from each time point were reviewed and coded according to existing themes. Where new ideas/themes emerged, the coders developed new nodes in NVivo to accommodate emerging concepts. Multiple first-order themes were generated with several second order themes encapsulated within these concepts. The final product of this phase was a more comprehensive codebook with many main (> 10) themes and subthemes that represent qualitative data.
Deductive analysis comprised a systematic approach to conceptualize how the data aligned with CFIR. Use of the comparative method and negative case analysis were highly integrated, as it was important to look for cases that do not align with the overall implementation framework structure [39, 40]. When initial themes were developed, the lead author and another co-author reviewed the themes and began to merge the inductive codebook with the NVivo CFIR codebook template . This process allowed the researchers to carefully consider each domain and construct, and to determine appropriate alignment to the model, where relevant (Additional file 3: Appendix C). Furthermore, researchers sought to code data related to the sustainability of SWITCH and the degree to which SWT believed they could continue programming as part of school culture.
Guided by experts in qualitative analysis [42, 43], a series of strategies were employed to ensure the trustworthiness of the data and analyses. First, a comprehensive audit trail was kept throughout the analytical process between the two primary coders to document key issues, trends, and whether any data saturation occurred, facilitating transparency in collaborative research . Second, peer debriefing took place whereby two other researchers reviewed codes and provided feedback on the interpretation of data, identifying gaps or areas of potential oversight . Finally, thorough negative case analyses were integrated to ensure that themes accurately represented the data and identified areas of divergence from themes [42, 43].
Overall, SWT reported implementing most of the program quality elements (see Fig. 2). Almost all schools reported regular SWT meetings (n = 27, 93.1%), followed by getting students online and adopting self-monitoring skills through the website (n = 25, 86.2%). Comprehensive integration of using SWITCH resources across the school setting (n = 23, 79.3%) and working to involve parents (n = 23, 79.3%) were implemented fairly well. Only 3 schools (10.3%) reported involving youth in a leadership capacity to deliver wellness programming (see Fig. 2). For setting-specific best practices, at week 6, implementation in the classroom was lowest compared to the lunchroom and physical education. In week 12, the opposite occurred, whereby classroom implementation was the highest, followed by physical education and lunchroom. The lunchroom implementation scores all decreased aside from reinforcement of themes (see Fig. 3).
The SWT rated the relative engagement of key stakeholders in SWITCH at several timepoints (Fig. 4). The reported engagement at week 6 and 12 was highest among physical education (2.9 ± 0.4 and 2.8 ± 0.5, respectively) and students (2.8 ± 0.4 and 2.7 ± 0.5, respectively) and lowest for parent engagement (2.0 ± 0.6 and 1.5 ± 0.5, respectively). All scores decreased slightly, except for student engagement, which remained the same. The SWT reported increases in capacity over time, as captured by the SWRA tool, in each setting (see Fig. 5). The biggest increase in capacity was in the lunchroom, from 2.3 ± 0.5 to 4.1 ± 0.5, equaling a 78% change in score, followed by physical education (from 2.9 ± 0.4 to 4.3 ± 0.5; 48% increase). School capacity increased 6% (from 3.2 ± 0.9 to 3.4 ± 0.5) and classroom capacity increased 2.5% (from 3.9 ± 0.6 to 4.0 ± 0.5), with classroom having the highest capacity at baseline.
Pearson bivariate correlations revealed non-significant associations between implementation composite scores and percent changes in capacity for the school (r = .16), classroom (r = .35), physical education (r = .02), and lunchroom indicators (r = .06). Paired t-tests also showed non-significant results for setting-specific capacity changes over time (all p > .05). ANOVA results also showed non-significant findings. As Fig. 6 shows, small but non-significant differences were found regarding levels of implementation (low, moderate, high) for percent in capacity change for school (F [2, 24]= 1.63, p = .22) and classroom (F [2, 24]= 0.20, p = .82) settings, with schools in the high implementation group reporting greater capacity change than the middle and low groups. For physical education (F [2, 24]= 1.45, p = .26) and lunchroom (F [2, 24]=0.29, p = .75), tests show that the moderate implementation reported higher but non-significant capacity gains compared to both the low (and high) implementation groups.
Table 4 displays all themes, grouped by CFIR construct and domain; selected quotations from the responses are added to illustrate each theme, providing context and negative cases where relevant.
Findings from interview and checkpoint call data highlight the ways in which SWT adapted SWITCH best practices and resources to fit the needs of their school system. One of the examples commonly cited was the adaptation of module/curricular content intended for one setting into another setting, as illustrated in Table 4, where the classroom module was adopted into science curricula to synergize with concepts taught in this content area. Further, schools discussed how they adapted activities, such as conducting taste tests, on a limited budget, demonstrating the ability of the intervention model to be adapted to school needs and capacity.
Many SWT discussed how taking part in SWITCH forced them to consider how to implement all its parts, which required extensive planning and converging at the in-person training conference and the weeks thereafter. In relation to the theme of complexity, several SWT saw the need to revisit how classroom instruction was conducted and took it upon themselves to provide professional development and resources to their peers as a means to enhance the implementation.
In 2019 the partnership with state 4-H Extension grew and the collaborating staff were encouraged to support school wellness initiatives by meeting with schools and helping with implementation, relating to the construct of cosmopolitanism. This support ranged in its intensity; some SWT felt that Extension support was vital to their success, stating that their local 4-H staff were a “part of the team” and took responsibility for various tasks. Other SWT talked about how Extension staff kept them accountable for the goals they had set in the first checkpoint call and were responsive to requests for help with various programming aspects.
Schools also collaborated with local agencies, predominantly for help with supply of food and equipment for programming and for hosting certain school-wide events for students and families. Finally, in relation to peer pressure, some schools reported hearing about the ways in which other returning schools had been successful in the 2017–18 SWITCH cycle at the in-person conference, and about what other schools in their district were doing, using this as motivation for planning their wellness activities/programs in the 2019 cycle.
Concerning networks and communications, most SWT discussed relationships with other teachers outside the SWT as a factor in their perceived ability to execute SWITCH best practices; most reported a positive reaction to programing and that their teachers were getting on board, whereas others mentioned a lack of staff buy-in which hindered their efforts. For organizational culture, there was a sense of staff members feeling overwhelmed with other responsibilities, which may have attributed to the lack of buy-in from the whole school.
Most SWT reported good support from administration (leadership engagement), and in relation to relative priority, some SWT reported that they were able to schedule additional opportunities and make room for wellness in their schedule, such as adding another block of recess. Unfortunately, some SWT lamented the lack of time provided to plan as a team and lack of facilities to conduct programming (i.e., available resources). Finally, although SWITCH was viewed positively by most staff outside the SWT, some SWT discussed the challenges faced when trying to change unhealthy “norms” in school culture, such as using recess as punishment, food as a reward, or more veteran staff not wishing to innovate in certain areas of the school setting which indicates a lack of compatibility. These factors acted as barriers to implementation of programing and relate to other findings (e.g., lack of buy-in, limited time/resources, etc.).
Throughout the formal programming phase, it became clear that other personal attributes such as SWT motivation was varied, as some teams were more motivated/excited than others. Table 4 reflects some of the key extracts from SWT, highlighting the divergent perspectives and situations. Most of the low motivation was linked to SWT feeling overwhelmed, and was reported predominantly in inexperienced schools, suggesting that lack of motivation/excitement may be attributed to inner setting factors (see inner setting- culture for additional information). Further, with regard to identification with the organization, SWT felt a strong sense of collaboration and engagement from others in their school, but some discussed sociopolitical tension in their school setting, which impeded their perceived ability to implement programming across the school setting.
For the planning construct, the in-person training conference was cited as a key socialization factor and motivator for school teams, particularly new schools, as they were able to learn from other SWT about their implementation practices and launch goal setting/planning for the semester ahead of time. Throughout the implementation phase, many schools discussed ways they were able to meet and accomplish planning responsibilities while balancing different schedules, such as biweekly meetings and sending emails.
In reference to engaging key stakeholders in programming, SWT expressed their success with changing perceptions of students; many reported how strategies such as taste tests, physical activity breaks, and monitoring screen time at home fostered behavior change in students and enhanced awareness of the importance of health behavior. The integration of students as leaders of wellness programming was described by many as a way to bolster their efforts to deliver SWITCH school-wide, as students also served as implementation champions, expanding SWT reach across the school setting. This aligns with findings from the checkpoint survey, showing that students were one of the most engaged stakeholders (see Fig. 4). Reports of parent involvement were somewhat mixed. Although some schools were successful in generating awareness, some SWT reported an overall lack of parental involvement with SWITCH programming. In relation to external change agents, SWT were able to engage local organizations, such as grocery stores and representatives from non-profit/government organizations (i.e., AmeriCorps, Food Corps) to facilitate with programming and even visit the school to help implement lessons and assist in school-wide events. Further, SWT alluded to specific strategies and practices adopted by their local Extension officer that greatly facilitated programming across the school.
With regard to executing the intervention according to plan (i.e., program best practices), several specific approaches were mentioned throughout the implementation phase as particularly successful. Many SWT found that the lessons in modules (i.e., classroom and physical education) were too long to implement (~ 20 min) or they didn’t have enough time to plan, therefore modified lessons to fit their schedule or split them up over two content periods. Other practices included teaching lessons in other parts of the school curriculum, such as science or social studies, which worked especially when school days were missed due to inclement weather. Interactive posters in the classroom, lunchroom, and physical education setting were commonly used and served to create a culture of health by driving student interest through posting trivia questions and challenges.
Finally, for the reflecting and evaluating construct, a key emphasis toward the end of SWITCH implementation was on sustainability, and how programs/practices could be sustained once the formal 12-week implementation phase was over. Many SWT felt confident that the lessons, resources, and programming would be easy to sustain and discussed how they had begun to link programming to their school wellness policy. Many tied this within their tri-annual assessment phase as per policy mandates, and found it was an important step, which allowed them to revisit many practices and policies in existence. On the other hand, some SWT felt that their policy was not a priority, and was merely a document to satisfy external requirements by administration. This was often due to administration who were either not supportive or aware of the need to revise wellness policies because of SWITCH implementation.
The study provides novel insights about school wellness implementation and the factors within and outside the school environment that affected school capacity and SWITCH program implementation. The adoption of CFIR and the use of both quantitative and qualitative methods approaches were critical features for studying the complex relationships influencing school wellness programming. Overall, SWT were able to adapt the intervention to meet the needs of their school setting and stakeholders, demonstrating the adaptability of SWT to mitigate structural barriers in the school environment. Findings from surveys and checkpoint calls demonstrated moderate- to-strong implementation of the best practices and an overall increase in setting-specific implementation over the 12-week period. Unlike prior studies that showed organizational readiness/capacity as a key predictor of implementation [45, 46], our findings indicated that changes in capacity followed a sequential pattern in relation to implementation, whereby the moderate and high implementing groups demonstrated greater capacity change in multiple school settings. These results have implications for further study of the relation between implementation and capacity, and the possibility of a bidirectional relation between these constructs.
Schools reported moderate-to-high engagement from students, classroom teachers, and physical education teachers, but lower engagement was reported from administration, food service staff, and parents. These findings may be, in part, due to the SWT representation which comprised mostly classroom and physical education teachers. A key finding was that school, classroom, physical education, and lunchroom capacity increased over the course of the implementation phase. These findings are reflected by those of Millar et al. , who evaluated the impact of implementing the “It’s Your Move” intervention in five Australian schools over a three-year period. The authors reported that capacity significantly increased in intervention schools over time, and that improvements in capacity were observed on five of the six dimensions of capacity assessed in the Community Readiness to Change tool .
Consistent with SWITCH, the It’s Your Move intervention  focused on engaging internal and external stakeholders in supporting school and school staff efforts to implement wellness initiatives. In SWITCH, community and parent engagement were enhanced by child health specialists affiliated with local 4-H County Extension offices. Specifically, Extension staff checked in with schools to provide support at several points during implementation. Through these touchpoints, Extension staff helped schools work through implementation barriers by providing advice, information on strategies that had been effective in other schools, and in some cases, they directly assisted with special events or programming.
Findings from interviews document the additive benefit of extension support; many schools felt that 4-H Extension officer was instrumental to implementation and would not have been able to implement SWITCH as well without this support. Interestingly, this type of support is often lacking in schools trying to implement wellness programming but was regarded as fitting within the scope of the 4-H Extension staff scope of responsibilities for their position . The provision of funding for (or direct staffing of) a wellness coordinator is potentially effective but not sustainable . Establishing effective linkages between schools and community partners that can assist with wellness program implementation in a sustainable manner is crucial for establishing long-term, effective wellness programming.
The SWRA provided a means to understand ‘Characteristics of Individuals’ and ‘Inner Setting’ factors which may contextualize the implementation practices adopted by schools. Previous studies have investigated the association between school capacity for wellness and program implementation and outcomes [45, 47, 49]. Findings from these studies document the potential importance of capacity as an influential factor associated with the implementation of school wellness initiatives. A retrospective study evaluating implementation of the CATCH intervention in 36 Illinois elementary schools identified that organizational readiness (i.e., capacity) was a key factor facilitating or hindering school staff implementation as well as classroom teacher implementation in the classroom setting . The authors reported that classroom teachers were required to do more work to implement CATCH compared to physical education and cafeteria supervisors/managers and there was no direct or external incentive for their efforts .
In relation to ‘compatibility’ and ‘relative priority’ from the inner setting, interview data provided valuable contextual information on school capacity to implement programming. One reason why some schools reported lower capacity at baseline may relate to the finding that SWT felt they were overwhelming staff with asking them to implement SWITCH lessons or use posters in each of the school settings, as reported tension over changing the “status quo”. Some schools also reported difficulty gaining staff buy in; such tension has been reported in prior research [4, 50] and highlights complexity when a new innovation is introduced to school settings. To combat this issue, some SWT reported using staff wellness challenges to gain buy-in and enhance the overall school culture, and making SWITCH modules/resources easier to use through creating binders/photocopying lessons for teachers to take (Planning- Striking a balance). Strategies such as these demonstrate the adaptability of SWITCH materials and messaging to align with the needs and context of different school environments, ultimately enhancing implementation and systems change for wellness promotion.
In the present study, classroom teachers had the lowest level of implementation in the early phase of SWITCH compared to the lunchroom and physical education, but the highest level of implementation in the later phase of SWITCH. This may be due to the teachers having more time to explore the SWITCH module and plan for integrating the content within their curriculum and teaching schedule. In addition, the check-ins with Extension staff at the mid-point of the intervention may have been useful for helping teachers critically consider and plan for better integration of the SWITCH module during the second phase of the intervention. Interview data also highlight the positive impact of concrete ‘planning’ (implementation process) opportunities, such as the training conference and pre-implementation webinars, on implementation. This gave SWT a chance to learn vicariously from other schools’ successes (outer setting – ‘peer pressure’) and meet as a team to plan wellness initiatives for the upcoming implementation phase.
However, other factors within the inner setting (available resources), such as lack of time and facilities/personnel, hindered implementation. These barriers are highly cited issues in many school-based health behavior interventions [51,52,53,54], and in this study manifested as a perceived lack of time to implement SWITCH quality elements and best practices. SWITCH emphasizes the importance of regular SWT meetings and evaluation procedures including meetings as a component of implementation measurement; checkpoint surveys and interviews did suggest that SWT met regularly as a team to plan and coordinate implementation strategies. Through interviews, schools discussed their adaptation of this best practice by meeting briefly before/after school, within mutual planning time, and/or planning implementation through email. As such, although time is often cited as a barrier, the in-depth data analysis process facilitated understanding of how schools overcome these issues to maintain a high degree of implementation fidelity. Thus, it may be argued that time was indeed not a barrier for most SWT, more that they had competing priorities for their time (i.e., core academic subjects). When asked about how they managed to meet as a team and implement best practices, many SWT were able to negotiate their schedules to implement the program to a sufficient quality. Such findings provide practical strategies for developing school-based implementation frameworks based on empirical evidence.
With regard to ‘executing’ (implementation process), SWT reported ways in which the SWITCH materials were adapted to meet their school needs, such as teaching classroom modules in science classes, integrating the physical education module into warm-up lessons, and other practical strategies which would not have been gleaned through checkpoint surveys alone. Other researchers have found that fidelity of implementation of HIV-prevention intervention curriculum was strongly associated with student HIV knowledge and self-efficacy outcomes . In their study, Wang et al.  categorized teachers into low, moderate, and high implementers based on their usage (number of lessons) and fidelity (carrying out lessons as planned) of curriculum indicating that fidelity to lesson plans was of great importance. In the present study, due to the comprehensive nature of SWITCH and that its quality elements/best practices target many aspects of the school environment, “fidelity” is a complex and multifaceted concept. The fact that SWT were able to adapt content to meet the needs of their individual school contexts, we believe, is a positive finding and aligns with the CFIR Intervention Characteristics construct of “adaptability” [19, 21]. Furthermore, when working with schools, it is critical to understand the pedagogical relevance of intervention materials in order to meet the needs of a wide range of school stakeholders.
Finally, the ways in which SWT reflected on implementation and the degree to which SWITCH programming could be sustained provided valuable information for future improvement. Most schools were extremely positive in their perceptions of SWITCH as a sustainable program, yet when discussing implications for their school or district wellness policy, several SWT had little to no involvement in this process. Furthermore, some reported that, when asking about their policy, were not given clear information on this document or its whereabouts, highlighting a disconnect between policy and practice . Although training was provided at the in-person conference about the Final Rule mandate, it is likely that more training and support is needed to help SWT as a means to enhance the connection between practice and policy.
The findings add rich understanding to the steps needed to sustain school wellness programming in school settings [6, 23], but it is important to acknowledge limitations. First, the SWITCH schools self-selected to enroll in the program, and were not representative of all schools in the state or country, limiting generalizability of these findings. Second, the checkpoint surveys and interviews provided self-reported (i.e., school-reported) implementation data and may be subject to bias on behalf of schools. It is important to consider the methods of data collection within D&I science, as researchers must strike a balance between collecting high-quality implementation data without over-burdening school sites [57, 58], thus self-report data may present the most feasible method for obtaining rich information from stakeholders. Finally, the checkpoint calls and interviews were conducted at times convenient for SWT members, and sometimes not all group members could not be present, limiting our understanding of all aspects of implementation. However, it must be noted that this is a logistical challenge when working with schools and it is imperative to adopt flexible approaches to data collection in such dynamic settings.
The purpose of this study was to examine the factors within and outside the school environment that influence capacity for program implementation. Findings underscore the need to study implementation using multiple methods, and the organizational capacity that might predict the degree to which schools implement the program. Multiple constraints were found to arise from the inner setting, such as lack of time/resources, staff buy-in, and administrator support. However, the provision of 4-H Extension support (outer setting) and the adaptability of the SWITCH curriculum/resources (intervention characteristics, implementation process) to be tailored to meet school context and capacity. This additional support may mitigate some of the barriers and constraints faced by SWT, enhancing the potential for sustainability of SWITCH. Finally, results show the importance of the school wellness conference as a training and socialization process, acting as a catalyst for planning and readiness for implementation. Further improvement to the SWITCH program is needed to support schools in taking their practice to policy, as a means to enhance school wellness environments and promote student health behavior.
Availability of data and materials
We have made the qualitative codebook and the interview guides for further information.
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The authors wish to thank the School Wellness Teams (SWT) that participated in the intervention, led programming, and provided their feedback. We also wish to acknowledge the students who helped facilitate data collection and analysis procedures: Andra Luth and Marisa Rosen.
USDA NIFA grant: 2015–68001-23242. The USDA was not involved in the design of the study and collection, analysis, and interpretation of data or writing of the manuscript.
Ethics approval and consent to participate
Approval was obtained from the Institutional Review Board (#14–651) at Iowa State University to conduct the project. Participating schools completed an agreement form at the beginning of the 2019–2020 academic year in which they indicated their consent to participate in evaluation procedures. All school representatives were aged 18 and older.
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The authors have no competing interests to declare.
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Additional file 1: Appendix A.
School Wellness Readiness Assessment Tool (SWRA).
Additional file 2: Appendix B.
Additional file 3: Appendix C.
Consolidated Framework for Implementation Research (CFIR) Codebook.
Additional file 4.
StaRI- Implementation Checklist.
Additional file 5.
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McLoughlin, G.M., Candal, P., Vazou, S. et al. Evaluating the implementation of the SWITCH® school wellness intervention and capacity-building process through multiple methods. Int J Behav Nutr Phys Act 17, 162 (2020). https://doi.org/10.1186/s12966-020-01070-y
- School wellness
- Consolidated framework for implementation research (CFIR)
- Implementation science
- Multiple methods
- Quantitative methods