Who knows about student rights?

i was taking PSAT's today and usualy we have a restroom break inbetween, but they told us that this year we weren't allowed to use the restrooms, and that if we reeaallly needed to then they would ask security to come to the clroom, walk us there, wait for us, then walk us back. theres two security guards.......for how many students?? i was extremellyyy mad at this. So i went off on the teacher about how their taking away our simple rights, then she tries to diss me in front of the whole cl. luckily im smart for a 15 year old girl and i was able to defend myself. i told her that i was going to do some research on the topic and go in to the principles office tommarow to complain. please tell me if you have any good logical arguments i can bring up. it just seemed so wrong.