An interactive star reward chart.
Print this Colour Star Reward Chart on A3 or larger. Laminate it so you can colour in the stars and then wipe them off when the class has filled them all in.
When students achieve a class goal or do something special to receive a reward, colour one of the stars in. You could write what they did on the star after you colour it in.
Set a goal with your class as to how many stars they get coloured in by a specified time and they could receive a class prize.