<p>As a PhD student, at a tippy top private business school- they at the time- I taught my own MBA classes. All of us grad students did. We almost always had higher teaching evaluations than tenure track profs. And most of us made faculty honor roll. Where else would we learn to teach?</p>
<p>Its true at research university that has graduate students. This worry is grossly overrated. I’d MUCH rather my kids have a grad student who is fresh with the material, remembers how they learned, takes their teaching very seriously and over prepares (this is the norm for grad students), than a lazy over the hill full prof who no longer cares or has to care, usually redoing the same old thing every year with the minimal of effort.</p>