I'm teaching a TEALs class at the moment, my first time, and can confirm it's a great experience. I have 1 or 2 classes a week, each about an hour and a half, and I do maybe another hour of prep before each class. The curriculum is all provided, so you just need to get familiar with it, not write it yourself. I'd be happy to answer more questions about it if you'd like! In my experience they were super responsive, so if you've already applied you'll probably be hearing back from a rep soon.