Have you tried the Ticket Reward System? It was the perfect fit for our family! Parenting tip: Use the Ticket Reward System to help your kids do the things they are suppose to (and pay for the things they aren't)!
It gives students the opportunity to move up the chart with good behavior instead of merely punishing the negative. I use this in my room except I have mine on a yard stick to make it portable. Really good classroom management tool :)