The design is simple (in a good way) and attractive, I like it. The idea is fantastic. Glossing over the comments I understand the concern that it's 'risky,' but this seems less risky than direct contact via their phone number which I'm sure some teachers already do.

Giving teachers more ways to communicate with their students is something I'll always be a fan of, and I'm sure even some parents wouldn't mind being on the list for some texts (assignment reminders?).

Congrats on a cool idea and a neat startup.