Hi@RozMoz,
Im.also a primary school teacher and worked most of the way thru my six weeks of radiation. I did need to take a few days of to rest, but I also live 90 minutes from the hospital, so tried to do a late treatment one day, early the next, then drive home, teach then back to hospital and repeat. Could only keep tgis up for a few weeks and was then exhausted. I stayed in the city for a couple of nights a week then and missed a few days of work.
Just play it by ear and see how you go. Teaching can be tiring all on its own, so take care and don't wear yourself out.
Best wishes
Michele xx