less a reward than a recognition of reality: you are succeeding academically and behaviorally, so we think you probably can manage with less rigid schedule
3 Cans of Worms Standards-based Learning Opened Up in my Classroom
Arthur Chiaravalli

Ah! I was hoping you wouldn’t go the reward route. I’ve read too much against rewarding good behavior. I’m with you on this — the more students (anyone!) can do on their own, the more they should be able to do on their own.