What is Sign Up Genius? It is a sight that all but eliminates notes going home for field trips, classroom celebrations, and volunteers for any school activity. This site allows the user to set up a page, list the activity, and decide exactly how many volunteers, snacks, etc. that are needed. There will be no confusion! Once all slots are filled, Sign Up Genius no longer allows additional parents to sign up. I recently used it have parents sign up to send treats/drinks in for our Writers' Workshop celebration, and Sign Up Genius worked like a charm.