An interactive butterfly reward chart.
Print this Colour Butterfly Reward Chart on A3 or larger. Laminate it so you can colour in the circles on the butterflies wings 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 circles on the wings in. You could write what they did in the circle after you colour it in.
Set a reward with your class for when they colour in all the circles on the wings and write it up the top so they know what they are working towards.