This is a whole class reward system. The class earn tiles when they receive a compliment from adults in the building as well about completing tasks as a whole class.
Print 2 copies of this (I did one copy in colored paper). Laminate and cut tiles from one copy our and keep in a small container for students to draw tiles when they earn them. When they earn a tile they will draw a letter and then color in the cooresponding letter on the chart. When an activity is full students earn the reward. My students love it and I hope that yours will too!
I am willing to edit to fit your needs. Including changing colors and incentives.