I was just wondering, what would be some good whole-class rewards to give an entire class for being on best behavior for a sub? Food is out of the question unfortunately, due to dietary restrictions from our district. And what would be some good rewards for individual students who are helpful for the sub. Keep in mind, that this is for 8th graders, so it has to have an air of maturity about it (because they like to pretend they are mature). Sciencey related things would be cool.