Thanks so much for the suggestions, everyone! I've requested a couple of the recommended books from the library, and will see how that goes. She may do some reading on her own, but I think it is the interactive discussion (with people other than parents) that she is interested in right now. The idea of seeking out a group at a local church is also a good idea I hadn't thought of and one to keep in mind, but dd is not ready for this just yet (an ardent and vocal atheist as a pre-teen, I think she is just starting to become more open-minded about religion).
And intparent, thanks so much for the input on THINK. I had noticed they did not have a philosophy class this year, but I will keep an eye on their offerings now that I know they change from year to year.
