Genius Bucks are a great way to help motivate your students and encourage positive behavior! They are available in the following denominations: $1, $5, $10, $20, and $100.
Genius Bucks can be used to reward good behavior, hard work, grades, etc. Genius Bucks are great for reinforcing money skills; and the teacher can encourage students to trade up when they have earned the appropriate amount (two $5 can be traded for a $10 bill).
It is up to the teacher to decide what the students can do with their Genius Bucks, but in my classroom we had a "Genius Bucks Store" stocked full of prizes (candy, snacks, folders, pens, pencils, erasers, markers, etc.)