Hmmmm - I remember Thursdays being a real fun day at school when I was in Year 9. The school had 4 "double" lessons a week but each of those could be split down to two single lessons. On Thursdays I had 4 singles so 6 different lessons altogether. Plus it was the "rotation" day for Science (4 double science a week, only three sciences so you rotated round between the three sciences on a Thursday). And it was my day for extra maths after school. (I was in an extension class.)
So 7 lessons - one of which could have been any of three lessons.
Average lesson required 3 different things (text book, exercise book, homework book).
Plus general needed things - lunch, water bottle, planner, calculator, pencil case, paper, notebook, folder.
By my calculation that makes 29 things I needed that day.
We didn't have lockers so we couldn't leave any of them at school.
It's all very well to say that kids need to organise themselves and I was actually pretty good - can't remember ever forgetting anything vital - but 29 things! Including remembering which of the sciences were needed?!? That was ridiculous!
The teachers were crap at the science thing too - one in particular (chemistry!) would regularly start teaching us the same lesson that we'd had three days ago and when we pointed it out to him would say "oh - you're 9G - I was expecting 9J - cue someone being sent off to biology to find out if the biology teacher had 9J when he was expecting 9H. Surprisingly unsympathetic when we turned up to chemistry with the physics text book though.