[Mr V]

Just because a team shows up as having their own not for profit orginzation does not mean they are not a single school team, a team based on a school district or don't meet on school property. Many teams form their own non for profit to ensure quicker turn around time to approve parts purchases and to be able to carry a balance forward until the next school year. I know a number of school districts that have a policy that a school account can not carry a significant or sometimes any balance forward.

In the case of WA The Other Gabe is correct that the vast majority of teams are based out of a single school with a handful being district wide teams, a handful of 4H teams and several at private schools.