M.R.
I'm being 100% honest here (I'm a teacher)...
In junior high or elementary school I would eat up the baked goods in a minute! However, I'm a high school teacher and there is NO WAY on earth I'd eat anything not pre-packaged from a high school kid. Maybe I'm being paranoid, but I'd rather not take my chances.
On the bright side, if the teacher doesn't like the food or is allergic to something they can always share it with their co-workers.