i dont know if this is specifically a BY problem but from comments made by female relatives of mine and things ive read, it seems the plan in girls school to keep the girls on the strait and narrow is to drown them in homework so that they never have a free second to do s/t wrong .
my friend told me his sister had to do s/t ridiculous like go thro the whole breishes and note every time the ramban mentioned someones name.
it also seems that any actual intelligence is not tolerated, bec any question asked that indicates a girl isnt at the highest level of emunah and bitochon at the ripe old age of 15, elicits a reprimand. (could it be that the teacher feels challenged bec she doesnt know the answer)
anecdotally, i was walking with my sister in the street, (sorry to all the tznius police) she saw her teacher coming and hid behind me, how sad is that. as a guy the rebbeim are always trying to have a kesher with the guys (having an oneg or just being friendly) that is the most important part of chinuch in my opinion. the best affect a teacher has on students is thro a relationship that the students feel the teacher loves them and cares about them.