Our university expects non-tenured TT faculty to have a 20% teaching workload. At my university, this translates to one course per semester, which means eight hours of weekly allotment to teaching.
I am a new faculty member in an engineering discipline (small R1, US), and I am really struggling with this. I teach a graduate course, and the lectures alone are approx 3 hours. Other things, such as clarification of student questions, assignment setup, etc, take 3 hours, and I am left with approx 2-3 hours a week to actually make any teaching material. Obviously, I can't finish that during that period, and it spills over -- some weeks, I spend 20-25 hours extra just on teaching (this is not a very trivial course). This is causing a drop in research productivity.
How do people usually handle this? I hear other people have more demanding requirements (more than one course per semester) than mine, and I can't seem to make myself more efficient. The department seniors have not been very helpful other than saying, "be a better time manager" or "put more effort into research."
I am looking for seniors' experiences, particularly people who have gone through this. Also, I understand this question is not very objective, so feel free to close if inappropriate.