1. Fail the test twice on Friday (by not doing homework).
2. After the second time failing the test, talk with Teo (should have an exclamation mark on top of his head) and get his quest to steal the test answers.
3. Go to school on Thursday at 7 p.m, and use the ladder on the left. You’ll find Mabel stuck. You help her and fail for now, going back home.
4. Do the same next Thursday and climb the ladder. Enter the school and go to the second floor.