Yeah, teaching quality across the board varies, among TAs and faculty. There is something to be said for experience, though. When I was a TA in my grad program, I had several years’ experience as a high school teacher under my belt. So I had an advantage in that respect. Still, decades of experience have made me better, even though I’m now closer in age to the students’ parents than to the students themselves. But that’s the point - nothing replaces experience. So TAships are essential; without them, we won’t have excellent college-level teaching.
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