If I hadn't had the chemo which made me so sick, I think I could have worked through week 3 of rad. If that is, work was somehting different than talking in a classroom--which is what it was for me at the time. My mouth was pretty sore by the end of the second week. I did end up keeping the one class I was teaching online and got through the grading --just barely--for that during treatments (the class ended during week 6 of treatments as I recall). I certainly wasn't the most responsive online prof that semester though and I was grading on pain meds at the end....