| Pretest | Intervention 1/Posttest | Intervention 2/Posttest | Follow-up-test |
| 45 minutes | 45 minutes | 45 minutes | 15 minutes |
|
| · self-learning materials 1 - 3 (grade 4) or · self-learning materials 1 - 4 (grade 6) | · self-learning materials 5 + 6 (grade 4) or · self-learning materials 5 - 7 (grade 6) |
|
| · content knowledge test (sun protection) | · content knowledge test on the processed self-learning materials | · content knowledge test on the processed self-learning materials | · content knowledge test (sun protection) |
| · interest in the topic sun protection |
| · interest in the topic sun protection | · interest in the topic sun protection |
| · behavior towards the topic sun protection |
| · behavior towards the topic sun protection | · behavior towards the topic sun protection |
| · demographic data · verbal skills |
| ||
|
| · sense of humor and humor appreciation test on the processed self-learning materials | · sense of humor and humor appreciation test on the processed self-learning materials |
|