Astronomy educators have an email community, the astrolrner listserve, with whom they can discuss the teaching and learning issues of Astronomy 101. If you are an astronomy teacher, you should join!
At the risk of repeating information that many readers may know about, I wanted to make quick post about the astrolrner listserve, the email discussion group for astronomy teachers, hosted by the Center for Astronomy Education. It is a moderated listserve (full disclosure: currently guest moderated by myself), so all messages are on-topic and members never receive spam or unrelated email by subscribing. Like most listserves, you can opt for individual emails and receive each post as they come in, or you can receive a daily digest of messages.
Astrolrner has over seven-hundred members, and it goes through flurries of activity every couple weeks or so. I have found it to be a valuable resource, because it allows me to see what other teachers are doing in their classrooms. Other members often request help with a particular assignment, generally finding that someone has developed a similar activity. The discussion can be quite lively, and, since it is moderated, they remain civil and on-topic.
If you are an astronomy teacher, then you should join astrolrner.