Funny- They have to leave it on their desk for when they come back...Love this because YEAH RIGHT they really wash their hands on their own in the bathroom every time! Re-pinned for all my teacher friends!
I have used this is my classroom for three years. It works like a charm. The students love to see how many gum balls they can earn during the given time. I have either set the timer for the full amount of work time or set it for smaller increments of time. As a reward, if they reach the goal, I sometimes give a piece of bubble gum, or something toward a classroom goal for some other reward...For example I might give them a letter toward building the word Compliments.