CONCLUSIONS: The Flex toolkit is acceptable to schools. It was perceived to improve a range of outcomes that relate to dimensions of mental health and school-based impairment; however, the study was not powered to detect quantitative change. A definitive evaluation would need to test a supported delivery model of the intervention to ensure that it is delivered with fidelity; we recommend a “coach” whose role would be to provide light-touch support to teachers to select and implement intervention…
