This includes three different designs that can be put onto a empty peanut butter or mixed nut jar to be used as a marble jar in your classroom for positive reinforcement. When the jar is full of 100 marbles, then the students earn a special event or treat. I always have my students vote on what they want to work towards. I have a list of acceptable rewards such as; Electronics Day, Pajama Day, Game Day, Extra Recess Day, Read-In, Snack Day, Popcorn Party, Hot Cocoa & Peppermint Sticks, and