Table 1. Overview process evaluation questions and scoring, to calculate the PES for teachers (score on 24).

TEACHERS
First focus period
Fidelity	Dose delivered	Dose received–exposure	Dose received—satisfaction
1. “Did you deliver the first sedentary behaviour newsletter to the parents?”     ▪ 1 = delivered (75.7%)     ▪ 0 = not delivered	5. “Was the classroom appropriately arranged for movement breaks every day of the week?” (assessed on a 5-point scale) ▪ 1 = often or always (61.7%) ▪ 0 = other answers	8. “Did you implement the classroom activities as described in the manual for sedentary behaviour?” ▪ 1 = often or always (49.8%) ▪ 0 = other answers	Following items were assessed on a 5-point scale ▪ 1 = agree or totally agree ▪ 0 = other answers 9. “It was easy to read and understand the text in the Classroom Activity Guide for sedentary behaviour” (1 = 68.0%) 10. “The amount of information and activities in the Classroom Activity Guide for sedentary behaviour were appropriate” (1 = 53.0%) 11. “It was easy to implement the activities described in the Classroom Activity Guide for sedentary behaviour” (1 = 60.7%) 12. “I enjoyed the activities I delivered this month” (1 = 65.2%) 13. “The activities I delivered this month were enjoyed by the children” (1 = 73.3%) 14. “The information presented in the Classroom Activity Guide for sedentary behaviour, the content of the material and the way the activities should be delivered are appropriate to achieve the goals” (1 = 61.7%)
2. “Did you deliver the first sedentary behaviour tip card to the parents?”     ▪ 1 = delivered (75.7%)     ▪ 0 = not delivered	6. “Did you devote on average at least one hour per week in the classroom activities as described in the manual for sedentary behaviour?” (assessed on a 5-point scale) ▪ 1 = often or always (60.2%) ▪ 0 = other answers
3. “Did you deliver the sedentary behaviour poster to the parents?”     ▪ 1 = delivered (72.4%)     ▪ 0 = not delivered	7. Sum score of 26 items related to implementation of classroom activities for SB (3 kangaroo stories, 8 classroom activities, 11 movement corners and 4 excursions) ▪ 1 = mostly implemented (9.1%) ▪ 0 = mostly not implemented
4. “All planned activities were performed.” (assessed on a 5-point scale)     ▪ 1 = agree or totally agree (47.2%)     ▪ 0 = other answers
Repetition period
Fidelity	Dose delivered	Dose received–exposure	Dose received—satisfaction
15. “Did you deliver the second sedentary behaviour newsletter to the parents?”     ▪ 1 = delivered (61.1%)     ▪ 0 = not delivered	18. “Was equipment and space appropriately arranged for movement breaks every day of the week?” ▪ 1 = often or always (50.9%) ▪ 0 = other answers	21. “Did you implement the classroom activities as described in the manual for sedentary behaviour?” ▪ 1 = often or always (37.2%) ▪ 0 = other answers	Following items were assessed on a 5-point-scale ▪ 1 = agree or totally agree ▪ 0 = other answers
			22. “It was easy to implement the activities described in the Classroom Activity Guide for sedentary behaviour” (1 = 48.0%)
16. “Did you deliver the second sedentary behaviour tip card to the parents?”     ▪ 1 = delivered (60.9%)     ▪ 0 = not delivered	19. “Did you devote on average at least one hour per week to the classroom activities as described in the manual for sedentary behaviour?” ▪ 1 = often or always (46.5%) ▪ 0 = other answers		23. “I enjoyed the activities I delivered this month” (1 = 54.8%)
17. “All planned activities were performed.” (assessed on a 5-point scale)     ▪ 1 = agree or totally agree (34.1%)     ▪ 0 = other answers	20. Sum score of 26 items related to implementation classroom activities for SB (implementation of 3 kangaroo stories, 8 classroom activities, 11 movement corners and 4 excursions) ▪ 1 = mostly implemented (8.7%) ▪ 0 = mostly not implemented		24. “The activities I delivered this month were enjoyed by the children” (1 = 59.8%)
Mean score (5.1/7)	Mean score (2.8/6)	Mean score (1.0/2)	Mean score (6.5/9)
Range (0–7)	Range (0–6)	Range (0–2)	Range (0–9)