I was thinking of using these with my 3rd graders next year and was wondering what you guys thought. For those of you that don't know, I'm moving from 5th to 3rd next year and want to make sure they're age appropriate. I was thinking of setting up the system where a student could turn in 1 complete filled up chart for a pencil. 2 charts would equal a treat. 3 charts would equal a mystery prize. 4 charts would equal a no homework coupon. 5 charts would equal a book from Scholasit for $5 or less (I would use my bonus points). Thoughts?