My advice is to document everything. Don't make verbal request but rather make them in writing and ask for a response in writing. Same thing if they request something from you. Ask them to put it in writing. You can also ask for a copy of the school policies if you are concerned their request might be unreasonable or unfair.

Recording conversations seems a little James Bondy to me. lol. You would probably need to ask their permission and then you might just as well ask for the communication in writing.