The Scrap of Paper contains the combination of a locker in the school. It’s 9, 37, 15, but even though you know the combination of the locker you can’t open it if you don’t find this. The locker, by the way, has a Twisted Wizard Game guide that you need in your next task.
How to Get the Scrap of Paper
Go right to the School area, run past the school entrance and jump up the pine tree and pick up the scrap of paper there.