This project started as an idea my first year teaching and has been revised over the past 8 years. It can easily be adapted for all levels of math K-12 with the purpose of a review. Simply put - students create 28 math problems with answers corresponding to the days of the month. The problem written on the first of the month will have an answer of 1, the 2nd of the month has an answer of 2 etc. I typically assign it a month ahead of time then give them a few in-class work days at the end of that month.