Have you ever found a really cool website you wanted to use with your class, but it required individual student email addresses? I found the answer last night.
Step 1: Go to Gmail.com and create a Gmail account for your class. (I used firstname.lastname@example.org)
Step 2: When signing up your students for whatever website you are using, enter this email address followed by + and a number. (For example, email@example.com, firstname.lastname@example.org, etc.)
Gmail ignores anything after a + in an email address, and sends all correspondence to the original email address.
Easy as pie!