Table 4 Overview of the data collection per instrument used
| Â | Instrument | Time when carried out | Approximate duration (in minutes) |
|---|---|---|---|
Experimental group | Pre-questionnaire | January 2019 | 20–25 |
Post-questionnaire | May 2020 | 20–25 | |
Interviews (with students) | May–June 2020 | 25–45 | |
Interviews (with teachers) | June 2020 | 20–45 | |
Control group | Post-questionnaire | May 2020 | 15–20 |