I don't know what you guys like to use for school, but I personally like backpacks better. I carry a lot of things in my backpack so when I use a purse or just any type of bag you carry with only one shoulder, it really hurts that shoulder and like my neck and you get the idea! So yeahhhh! The first two years of high school, I've used a Roxy backpack (the first one shown below).
♥ Roxy ♥
♥ ebay ♥
♥ Vera Bradley ♥