Sign Up Genius (https://www.signupgenius.com) is truly your friend when needing to have people sign up for activities. It sends reminders to those signed up, you can import events you have signed into your personal calendar, and you can easily communicate updates about your event, etc.
Here are some tips and tricks when using SUG that I thought I’d share.
Use a Group to manage all the members/people you want to send your sign up to. It’s nice to set this up at the beginning of the year once you receive your class list.
To populate your group, use the Import From My Provider feature.