SuperFlyHigh and catfart that sound pretty shit.
ifgrandmahadawilly re "To the poster above who asked, I'm definitely female." That was me. Sorry, I realised afterwards you had said it was an all girls school. It just struck me your acceptance of sex that was not consensual as part of teenagers experimenting was rather alarming to me!
But.....
Re "As to the group sex stuff: the stuff that was consensual: fair enough - although we were damn lucky camera phones weren't a thing back then. Some of the other things I remember though, I look back in horror at. Particularly the 'non-consensual' incident I mentioned earlier. It is weird that we all took that in our stride back then."
Thanks for clarifying, I apologuise if my response was a little strident. You seemed to be taking it all in your stride now and that alarmed me.
I know when I was at school there was under age sex and one girl had a naked photo of her boyfriend to show at school (no phones then!) and obviously pregnancy scares and bullying, drunk teachers, a teacher who hit a pupil, fights, etc but you sounded a bit too OK with how it all happened, but I can see now that was me reading into that, and I apologuise. 
What is actually giving me some hope here is that the OP is asking is this normal, maybe something we did fail to do when things were happening at school for us, and more than is it normal, is it acceptable.
Maybe now young people, especially young women, are asking if they should have to put up with this. (I am not forgetting women can be violent too, at my school bullying always seemed to be boys bullied boys and girls bullied girls!).
Anyway, the bit of hope I have dug out of all this shit is that people like the OP are questioning is this right.
My dd starts secondary school soon and I know I will be more aware than my mum was of things that go on when I was younger.
In my school days (a long time ago) these things weren't happening at school for me but at 16 I was coming into contact with alcohol and drugs and could have come into contact with the occult and sex too if I'd wanted to, luckily there was no pressure for me. Just some very late at parties who knows where (I certainly didn't know where I was as I was throwing up into a bath - took me years to like brandy again!) Anyway, I guess now this has reminded me to know more about what my dd is up to, and what pressures she may be under.