It is not uncommon to hear people tell of in-boxes with thousands of unread messages. However, I suspect most of those messages do not require their personal attention. I recommend that you reserve your inbox for messages sent specifically to you. (This can also keep bulk announcements and such from causing your phone to alert you that you have new email.)
- Create and use a GMail label and filter that applies that label to class email list messages.
- Take a screenshot of the filter and submit it to me as required by the assignment.
The screenshot shows a couple example filters and not necessarily the same ones you would use for yourself or class.