In Chapter 3, when you enter the school. Leonard will be in the next room on the left (nervous kid). He'll give you the quest. The poster hanging spots are:
- Science room / Room 204 (top left)
- Principal's room (very top room)
- Math room / Room 116 (top right)
- Gym (BasketBall symbol)
- Courtyard (Next to science & cafeteria)