For the past three weeks I've been keeping track of how much time I spend on teaching. Here is my first post describing my teaching time in lighter weeks.
Week 3: March 8-14
Heavy grading week (lab reports)
15 hours spend on grading, class prep, student correspondence, and student meetings outside of office hours
6 hours in the classroom
3 hours on TA meetings & office hours
Total: 24 hours
Thankfully this week is not a typical one. I only have to grade lab reports four times during the semester. It makes that week really busy, but I think it's ok considering that I usually only spend 12-14 hours and my position is 50% (20 hours). To the other TAs out there, how much time do you spend teaching?