No one uses them. Students would rather carry every book they own in the backpack than use a locker.
If "students" are to friggin dumb to use the lockers, then TS.
People have been carrying books for thousands of years. Why is there an issue all of a sudden. We used to walk to school too...
I go back some years, but we didn’t have backpacks. Some kids had bookbags, but most poor schlups like me carried the books on our arms. And we had a lot of books since we had a lot of homework.
I also tend to think that some kids might be nutritionally deficient and that could be more the cause of all this pain and what not than the heaviness of the bags. When I was a kid, we drank milk by the gallon and my mother made sure we had three healthy meals a day. Now, I see kids with potato chips and soft drinks on the way to school. Those sure help to build strong bones. (she said sarcastically)