Get with a good, local agent. I would recommend Shane Powell with Crye-leike in Franklin. He is a very hard working, honest guy and knows the Nashville area well. I am sure he could do a detailed search for you and you would really enjoy working with he and his wife, Susan. You can email him at firstname.lastname@example.org Good luck.
Are you looking to start a private school or convert an existing school into condos or a commercial use? In Knoxville, we have several properties that could potentially serve either of those applications. If you can provide more specific information. I'm sure I can point you in the right direction.