OMG...I am an AVID KIPer! Just yesterday, I arrived at my health club about 1/2 hour early for a class, so I sat in the locker room (its a VERY nice locker room with a "lounge" area...cushy chairs & TV & all!) and knit.
I had THREE people come up to me to see what i was doing and ask me questions. I told them I was exercising my wrists.
I find that people either ask me about what Im doing, or they glance at me & keep walking.
If I can knit at a GYM, you can CERTAINLY knit in study hall!
PS....I have an "assistant" working with me for the summer who is 15. She is VERY intrigued by my knitting. She has friends who knit. She wants to learn.