There's an element of truth to that, but I'd argue an effective teacher in a classroom environment also needs to know how to communicate to a group of kids. I'v

There's an element of truth to that, but I'd argue an effective teacher in a classroom environment also needs to know how to communicate to a group of kids. I've had teachers who clearly had an interest in a subject but weren't able to get it across (for reasons that were a little hard to judge). Arguably that's the sort of thing that teacher training should give teachers a chance to refine, though I don't know if that's the sort of skill that teacher training focuses on at the moment.