This is the most popular homework project of the year! Students create their Valentine mailbox (the week prior to Valentine's Day) and incorporate different math requirements into the box. The math requirements are based on 3rd grade math standards (4th Grade version is also included!), but can easily be modified to meet your needs. This also includes a student-friendly rubric.
Project also includes certificates for winning boxes and a voting list that can be cut out for each student to vote with.