Yeah... we went through that with my son. It was terrible. He has allergies and couldn't keep a stash of tissues with him without a backpack. AND he is not the most organized person to start with, so we had his backpack all set up so he'd have spare pens/pencils, tissue, paper, etc. NOPE. It goes in the locker and STAYS there until dismissal. Then they are RUSHED to get what they need from their lockers and get out of the building.
My daughter is middle school this year, and I'm not sure how it's going to work for her. No backpacks still. But she now has a retainer to deal with, so she has to carry her case with her all the time, since she has to take it out to eat. I guess she'll figure it out (I hope so anyway)... and not forget to get it out of her locker at lunch time before the meal and to put it back afterwards. As it stands now, she remembers it by ALWAYS taking it EVERYWHERE with her when not at home.
It's craziness if you ask me. So they can't bring the backpacks anywhere but to their locker... so what's to stop them from taking "whatever" out of the pack at their locker and secreting "whatever" under their shirt or jacket? If they aren't going to do anything to stop them from bringing something INTO THE SCHOOL altogether, then why be so strict about backpacks being carried from class to class? I don't get it. Seems pointless.
But a real PITA. Especially kids that struggle with organizational issues. :(
ETA: The idea of a pencil pouch in one big binder (with dividers) to keep everything together is a good one. I thought so, too. Until my son started 6th grade and we realized that every one of his teachers had a list of binders/folders and supplies he needed to have/bring for his classes. And they were all different. His science teacher wanted binder "a", his social studies teacher needed binder "b" (different spine sizes), with x number of folders with prongs, plus notecards, plus the required agenda book, plus... and math needed calculator, colored pencils, etc, ... It took THREE of those zip in pouches to fit everything he needed... not including the tissues for his allergies.
Then to try to have ANOTHER item that was a 'catch all' for extra pencils/pens/erasers, etc.. it was absurd.
He would have been FAR better off with one or two big binders with dividers, but his teachers required separate binders for each subject!
Oh yeah... and they had to dress out for PE, so that was ANOTHER pack of stuff to keep in his locker (gym clothes and shoes/socks)... the lockers are only so big, ya know?
He did muddle through, but my gosh at the lost papers and the trash that accumulated in his locker. And the number of times I heard: I couldn't find it to bring it home and the teachers rushed us out of the halls...