Where I live we don't have middle school, just grammar school straight through 8th grade. My daughter also goes to a small Catholic school, so no lockers, just a closet in homeroom to store their belongings in. Her school also does not approve of rolling backpacks, but my daughter knows when she's in school she needs to carry it. I'm sorry, and I don't mean to seem like I'm above the rules, but when you send kids home with 25 lbs of books (yes, we weighed it one night and this was in 4th grade), I will not make my child carry that anymore than is absolutely necessary. She can wheel it from the house to the car, the car to school, but once inside she knows she needs to carry it.