A self checking, student managed drill center that can be diversified. I copy and laminated 6 copies of the drill sheets and answer keys then leave it in the center for the students to complete whichever one they are assigned. They write the answers in their math journal and write a self analysis paragraph on the back after the check it. Weekly 25 point tests, taken from the card they are working on, keep them accountable. If their practice is perfect yet the tests are far less, we have a discussion.