These are already made for you. Just print, cut out and BAM you've got a fantastic way to motivate your students!
I use these as part of my management System. Students can earn these "coupons" by showing quality behavior. It is a great way to show what behavior you like to see without just giving students "stuff". Most of these are things that students can do in the classroom which is VERY inexpensive.
This comes with a letter to send home with parents as well.
I use fake dollars, which I give to students who are doing an excellent job behavior or academic wise. For every $5 they earn, they can buy a coupon. I attached a dollar template that you can use if you'd like.
My kids are OBSESSSSSED with our "store" and it has helped their behavior tremendously. :)