This is going to sound like I'm asking you to do my job for me. . . and, in a way, I am. Sorry about that.
I run
Bite Sized English as a blog for English learners and there are tons of recordings with, mainly my voice. Since the lessons there parallel what I'm preparing for the classroom, I have a list of topics to prepare, and I'd like to have recordings I can use in the classroom . . . and that would mean not my voice. (No point in bringing a CD player, if they're only going to hear me speaking.)
What I'm thinking is that, if we did recordings together about topics we know about and shared them, then we'd all have recordings to get our students other native speakers to listen to in the classroom.
(You're welcome to use anything on my site in your classroom, whether you make a recording or not.)
My first question is: Would anybody be interested in making recordings? We're all experts in something.