Metzy--
I'm not sure about this one. This is a case where I would LIKE having the EIN being the same as the school's.
Is the EIN the same as the school's? If it is, I should think it is now the responsibility of the prinicpal, or whomever he deems worthy of the job to get all the important paperwork back. Sending a certified letter to the treasurer and secretary is probably the best way to do that--paper trail and all. As far as the checkbook goes, I'd call the bank. Your current president or principal would have the authority to change the signatures--especially if the group has been disbanded, and you'd probably have to sign some sort of release giving the school the account.
If the EINs are separate, I don't see how the principal could have had you disband or take over the account--BUT I would then think the remaining officers would have to meet--WITH A WITNESS, i.e. the principal, and decide what to do. If it is a separate EIN it could be a lot messier. Still, I'd go to the bank and ask them what to do. You'd probably have to sign some sort of release turning the account over to the school, in which case the principal and whomever else he wanted would be the official signers.
I'm with Serendipity on this! The only problem I have with karma though is that I want to be around when ill happenings befall my tormenters, so I can enjoy it!