Schools do not buy like clubs. There is a purchase order, a finance office, a budget that resets with the academic year, and often a requirement to show comparable quotes before anything is approved.
There is also rarely one team. A school orders for football, netball, athletics and rugby at once, across age groups, with a PE department that wants it to look coherent rather than like four separate purchases.
We quote formally on letterhead with everything itemised, accept purchase orders and invoice on your terms, and handle multi-team orders as a single project with one delivery. Sizing runs on an age-band block, and we will always recommend a size set before a full year-group run — students grow, and a chart is a poor substitute for trying the garment on.