Mardy Freeman spoke for the NearHim Home Educators meeting last month. I recorded it, but the audio quality is not the best because I put my MP3 player on top of her video projector. It's still worth listening, though!
You need to turn off the Playlist music at the bottom of the page before you start.
You can find out more about Mardy at her web site, http://www.thefreemans.org/. You might especially like to read her humorous article, Noun Loss.