If they are paying for the supplies, I understand why they do it that way.
In my schools, a list was sent home the first day of school that my parents had to go buy. School supplies such as pens, erasers, paper, scissors, pencils, etc, all had to be paid for by the parents. It didn't even occur to me that other places might do it differently because this has been the norm from Kindergarten to college.
If you want your kids to have those supplies, then buy them for your kids yourself. The schools don't have much money. If they don't need to spend money for your kids supplies then the money can go somewhere else useful.
In my schools, a list was sent home the first day of school that my parents had to go buy. School supplies such as pens, erasers, paper, scissors, pencils, etc, all had to be paid for by the parents. It didn't even occur to me that other places might do it differently because this has been the norm from Kindergarten to college.
If you want your kids to have those supplies, then buy them for your kids yourself. The schools don't have much money. If they don't need to spend money for your kids supplies then the money can go somewhere else useful.