Do you want to challenge your students? Ask them if they want to take a risk. Ask them to complete this Slime Challenge... How?
Well, tell your students that you want to do a real slime with them in one of your classes but first they have to complete this 20-day challenge. When they behave they get a sticker. When they fill this format they will be able to do it.
Note: Cut out the little circles on the second page and paste them at the end of every class your students behave.