Personally, I'd prefer to see subject experts teaching, even at the elementary level.
Being a subject expert is good, but it's not a substitute for knowing how to teach. (Reference terrible TAs in grad schools who may be brilliant but have no idea how to convey their material effectively.)
Knowing how to teach is good, but it's not a substitute for knowing your subject. (Reference lovely, kind elementary teachers who use apostrophes to pluralize and don't understand math.)
You really need both. And that's our problem.
I think my DD may have a teacher this year who is the total package.
