I had quite a few students who did not use their time wisely while working on their planet accordion project. I could not dedicate any more class time to finishing so what I did was seal an envelope and cut it in half. I glued it into the notebook and put their cards inside of the envelope. On the outside of the envelope I gave them their grade, based on amount of work completed, and listed everything that was incomplete. I am giving students until we break for the holidays to complete for a better grade on their own (giving them the opportunity to come into class early, work on it during homeroom, or stay in for recess to complete if they wanted). The completed project will then be glued over the envelope once complete.
So far I have only had three students take me up on the offer.