Table 2 Operationalized implementation measures and data sources

Fidelity

Extent to which the program was delivered as planned/trained by HL-trainers.

Classroom observations

Interviews with HL-trainers

Appropriateness

The relevance, suitability, and usefulness of the program. This includes the fit of the program to the classroom context, perceived utility from among recipients and implementers.

Students’ evaluation survey

Interviews with HL-trainers

Acceptability

Degree of satisfaction of students, schools, and HL-trainers with the program.

Students’ evaluation survey

Interviews with HL-trainers

Interviews with school professionals

Feasibility

Extent to which HL-trainers and school professionals perceive the program to be feasible to deliver in other contexts, as well as fit of the program to the classroom setting.

Interviews with HL-trainers

Interviews with school professionals