I have only taken a few classes. I arrived 30 minutes late to the first one because of mix-up of start time. The instructor avoided helping me all day. Bummer. I already felt lost being late.
I taught elementary math for 26 years. Tons of preparation daily! I miss it! I was a fun and games kind of teacher in low income areas near Texas/Mexico border.
There is a cycle to a lesson. Not all instructors follow one. Just because you can do something doesn't mean you can be clear when explaining your method.