The first day of school I give the kids an e-mail address that I use daily and ask them to send me an e-mail with their name and class so I can create a class e-mail list for the class.
The e-mails are pouring in. I'm even getting them from my four term algebra classes!
More work for me but I don't mind. I'm glad to have kids that care and I'm glad to be able to help them.