We’d all agree that to teach a subject, you must know the subject. So you’d think that experts would be the best teachers, but they’re not. The question is why?

To understand why experts have trouble teaching well, you have to understand what makes experts different from the rest of us.

People who are truly experts in a subject have knowledge most of us don’t. But that does NOT make them a true expert.

What makes them a true expert is understanding.

And with real understanding comes Abstractions.

Source: Why Experts Make Bad Teachers — Medium