I use these coupons along with a store menu to reward my class each month. Throughout the month, I give my students money each day based on where they end up on our clip chart. I made money with my picture on it using this website: http://www.festisite.com/money/us_dollar_1/
If they stay on green (Ready to Learn) they get $1. If they move up to Good Day or Great Day they get $2. If they reach Outstanding they get $5.
At the end of each month, students can use the money they have collected towards any of these store items. They can choose to use all of the money on various prizes, buy something small and save the rest, save all their money, or work with the entire class to buy a whole class reward. When they buy an item, I give them one of these coupons to redeem at a later date.
The store menu can also be found in my TpT store.