Getting help from your principal and local school district

[Roger]

Become everyone's friend, from the Board of Ed to the janitors.

Especially the janitors. If you are in the school building they are the ones with the keys.

In addition to rc_cola1323's and JohnBoucher's advice, look for places to put your facility. Is there a spare room available? A building on campus not being used? During the fall a classroom may do, but once build season is on you are going to be building for long hours and "putting away your toys before bedtime" isn't going to be good. Always find an answer to your request, or multiple answers. It shows you've been researching and it doesn't put them on the hook for doing work. (Also known as "saving face".)

When you go asking, first build them up (what is FIRST all about, why is it good, etc), then here's the problem (we need space, money, time, teachers, etc), finally give them a solution that makes everyone feel good. (We found an ideal space thats been storing old gym equipment, can it be moved to here/given to the elementary schools/gotten rid of/etc? It hasn't been used since my parents went to school here.) Be creative, be polite, be positive. Remember there is only a limited amount of space to go around.