They don't. I still had my 4th grade crayons to pass down to our kids. Some of the multiples are because some parents can't be bothered to provide supplies so we have to take up the slack. I used to sub and witnessed teachers throwing away garbage cans full of brand new supplies at the end of the years.
As good as that may make teachers feel, it is not my, nor my daughter’s, nor my son’s responsibility to provide ‘excess’ for themto unilaterally decide to ‘redistribute’ to minorities and children of irresponsible parents. The “Dozen” boxes thing was REAL....REAL! I pay enough taxes. Screw them if they won’t provide the needed supplies. They certain live better than most Americans while they’re on untaxable EBT benefits.