It's possible to teach a subject while not being an expert. That's where a good teacher pulls them in and helps teach the students how to learn on their own. That being said, this requires a teacher who is at least as intelligent as their students.
Apparently my grandfather ended up teaching a course he was taking while in the military. He was able to teach it better than whomever was originally assigned as the teacher.
Apparently my grandfather ended up teaching a course he was taking while in the military. He was able to teach it better than whomever was originally assigned as the teacher.