<p>From what my daughter has experience in STEM classes, post docs are actually some of the nicer/more helpful/fairer teachers, they remember what it was like on ‘that side’ of the podium :). I would not worry too much, post docs often teach lower level classes (as far as math goes, calculus is low level, so I’m not surprised to hear of post docs teaching it). One of my daughter’s favorite math professors was a post doc, and her other favorite was a grad student! The tenure track really didn’t seem to care as much and were often less helpful and less likely to be in their office to answer questions, while the postdocs have somebody to answer to, if that makes sense.</p>