>>1511083I personally made "ckassroom" one girl at a time. Whenever I felt like I wanted a new girl I made one and without regard to how the other girls in the room already look. It seems to me like you did the opposite and are working from the class concept down.
Also, to make the girls look more individualistic while still trying to maintain the illusion of them being in a class together you can try having a base uniform and then modify it very slightly for each girl. Pic related.