This is meant to be laminated and used with a sharpie. For example when a student does do their homework the teacher will ask the student to mark an X in black sharpie. They have lost a dollar that can be spent in their teachers rewards store. This also works for when students are not behaving appropriately they can lose a dollar (letter) because a responsible student would not do that. The student can also earn back their dollars by turning in homework and changing their behavior. The teacher can write over the sharpie using a dry erase marker and then wipe it off with the dry erase marker and the sharpie will be removed. At the end of the month the students can redeem their dollars for rewards such as pencils, erasers, comic books, etc. If the students loose to many dollars at a time then their parents will receive a phone call. Make sure to go over how this works with your students at the beginning of the year. What I mentioned are ideas you can use this in whatever way you wish.