My DGD is a freshman in high school. I bought her an expensive Jansport at the beginning of the year, but it was too big to fit in her locker!! So I bought her a new one...this time she got to pick it out herself. I also found out that none of the high school kids use wheeled backpacks - just not cool I guess, so now I'm wondering if it really didn't fit the locker, or if it just didn't fit her style! 
