but I can say, this differs vastly from district to district.
I taught for 10 years in the inner city. There we never asked or expected the kids to bring anything.
Now I live in a wealthy bedroom community. The supply list is miles long...and specifies such things as only Prang paint ($3 vs Crayola that is .88) They want name brands and even require things like jump drives. Last year DS1 had to have a scientific calculator. Guess what, it came home in the package because they don't ALLOW calculators.
That is what peeves me...the arrogance. That wasn't the first time that I was required to purchase something that was never used.
As to the question of shared supplies: yep, that happens in some districts. My sister's kids attend a district that won't let them label anything...and they have "community supply chests". Yes, that does mean that parents who don't supply anything ride on the coattails of those who do.
I've taught in a variety of districts and schools. Some didn't ask for anything. Some asked for things as far fetched as film and drinking cups. Some let each teacher decide how to distribute supplies. Others required each grade level to make a decision and everyone had to do the same thing.
Some have supply lists for each school, some have generic district lists. The worst one had both...they expected you to supply everything on the generic list before classes started, then gave you the "real" list and expected you to go buy more.
Believe it or not, the district where I'm at now requires fees for classes, even for elementary kids. My second grader has to pay a $5 technology fee. Why? Because they print some of their projects. Last year it was about 1 per quarter. That is some spendy printing!
As a teacher, though, I commend those who send extra. I always say that the best teacher gifts are things for use in the classroom...games, manipulatives, bags of supplies. Because, as much as parents supply, there are always kids who don't have what they need. I have 80 theme books in my trunk right now...figuring it was easier to buy them now at .05 each than to beg parents for them after school starts. I taught in one district that actually had building supply rooms so teachers didn't have to purchase supplies out of pocket. Little did I know then that when I moved I'd never see that situation again!