Student salaries do not cover all the rent and utility bills students must pay every month. (More on that later.) So... students must work hard to get bonus money throughout the month.
I printed $50, $100, & $500 bills from MyClassroomEconomy.org. Easy!
I have the cash on hand and pass it out throughout the day. Sometimes I will explain why I am handing out bonuses and sometimes I won't. It just depends on the situation. Give a student $100 for a good answer, and you will love all the hands that start going up!