Third Interview?

This afternoon a third, very large school called me for an interview.  I already took the job with my second interview, but I decided to go in and talk to them, see what they have to offer.  They did tell me on the phone that they pay their teachers for prep time, which is the holy grail for educators.  Perhaps I can teach at both schools for a bit, then see which one I like better and pick up more hours there.  The interview is tomorrow, followed by an afternoon meeting with the director of the school where I will work starting on Monday.