This is a good example of a visual token system. This would be especially beneficial for students on the Autism Spectrum. Having a visual reminder of a motivator is a great tool to get work time out of a student who struggles to do so.
Reinforcing the Difficult Child When Token Boards Don't Work!
True to its name, this token system for positive behavior in kids is the easiest and simplest that you will find out there. To begin with, this system doesn't require you to track each child's behavior like with other token systems!