Summary of data collection tools, their associated outcomes and time points of data collection
| Data collection tool | Description | Study outcome(s) | Completed by | Time point completed |
| Nutrition Attitudes and Knowledge Questionnaire | 20 items on nutrition knowledge (1 point each) 5/20 items each dedicated to specific food groupings creating sub-scores (eg, drinks, whole grain foods) 4 items on a 5-point Likert scale evaluating nutrition attitudes |
| Children (paper) | Day 1, day 5, week 4, month 3 |
| Nutrition Behaviours Questionnaire | 20 items evaluating general nutrition behaviours (eg, eating in front of the television, eating breakfast, drinking water) | General child nutrition behaviours | Parents (online) | Baseline, day 5, week 4, month 3 |
| Block Kids Food Screener | 41 items evaluating the consumption of fruit, vegetables, whole grains, proteins, fat and added sugar in the past week | Dietary intake | Children with parental support (online) | Baseline, day 5, week 4, month 3 |
| Acceptability Questionnaire | 11 items on a 5-point Likert scale evaluating acceptability (eg, length, difficulty, overall experience) | Intervention Acceptability | Children (paper) | Day 5 |
| Parent Demographic Questionnaire | 15 items on demographic variables (eg, dietary restrictions, socioeconomic status, food insecurity) | Covariates | Parents (online) | Baseline |
| Teacher Demographic Questionnaire | 11 items on teacher-level (eg, years spent teaching) and school-level variables (eg, nutrition policies and programmes) | Covariates | Classroom teacher (online) | Baseline |
| Field notes | 14 items assessing fidelity of the intervention delivery (eg, attendance, timing, modification of intervention) | Covariates | Study teacher (online) | Days 1–5 |