<p>In WA state, I have to take three courses every five years, to keep my teaching credential. There are no restrictions on what to take, but I like to take them online, because it’s so much easier that way (my schedule, not theirs). I’ve taken oceanography, weather, the English novel from 1800-1850, geology, accounting… a few others. I also took Italian on a non-credit basis at a local CC. (If I did a language again, I’d look for an intensive course in-country.) </p>
<p>I have also found, as EmeraldKity points out, that being an older student can sometimes mean that you’re the one with the experience and knowledge. I have found that I am <em>really</em> good at annoying the heck out of the instructor, as a result.</p>