If you use "Teacher Bucks" as a reward system, then use this site to put YOUR OWN picture on your bills! Students will work hard to earn them and may even want to keep them rather than "cashing" them in for end rewards.
Reward good behavior, chores, accomplishments, etc with "kids cash". Money can be taken away if they misbehave or if mom has to complete their assigned chore, then they pay mom. ;) Have a "kids store" at home with fun goodies, homemade coupons, and other incentives.