Author Teleseminars is a free site for those who want to hear interviews with the best and brightest business authors, including Seth Godin, David Allen, Dan Pink and Keith Ferrazzi.
I've been a member of Author Teleseminars for several months now and I love the free calls and the chance to download recordings with some of the top authors and experts. Usually, I just go to the archives and download several seminars into my Zune (kind of like an iPod, or mp3 player) to listen while I'm out.
I think these audios would be relevant to anyone teaching high school business courses. Registration is required, but it's an easy, three-question process (name, email, referral). Unsubscribing is an easy, one-click process.