Ask HN: Committed weekly classes for CS/math/tech/finance?

I'm taking some (human) language courses online and realized that the commitment of making time for class a few times a week really helps me learn and stay committed to learn. It's a normal language class where the students interact with each other in video.

Are there online classes in this format (online videocall, slides, exercises) for other areas like CS/math/tech/finance?