SIGN-O requires the students to get 5 signatures from classmates in order to win! The rules are simple: 1. You must use an ink pen. 2. You cannot sign your own paper. 3. A classmate can only sign your paper once. 4. You must be truthful because you may have to prove your signature! 5. Have fun! The back-to-school set is a great ice breaker or team builder at the beginning of the year. The end-of-the-year set is a great way to remember all the events of the year!