Can I edit the amount of XP granted by collaborative powers?
Yes. As the teacher, you can edit the amount of XP granted by collaborative powers.
Under Advanced, click "Game Rules" to modify the "amount of XP gained per AP spent using a collaborative power."
The default for collaborative powers is set at 5 XP per AP spent. For example, a power that costs 15 AP like Heal 1 will earn the student 75 XP (= 5 x 15).
Note: Protect grants twice the amount of XP as other collaborative powers!
This customization is optional as all default powers and their AP values are already well-balanced for a regular classroom.