This class level may start out a bit simple for a lot of hn people, but it might fill a niche as well. The idea is to have very short, very simple ideas taught quickly (10-15 minutes, including examples), followed by 25 minutes of questions and answers from the class.

It's all free and done to help out the community. If you have any questions, I'll be happy to answer them (though I'm not the one teaching it.)