A wide variety of free lectures by experts in their respective fields are available for free online. These sites contain free, easy access to excellent supplemental lecture resource materials. A few sites to consider are the following:

• BBC, Interviews of Famous people, (experts in their respective fields)
• BusiTalks (a collection of lectures by business leaders)
• Cogito, Annotated Directory of Educational podcasts (from Johns Hopkins)
• Conversations with History, Lecture Series (Distinguished men and women talk about their lives and their work from a wide variety of fields)
• Conversations with History, lecture Series by topic
• GovTalks (Government leaders and political figures)
• Kansas State University, Alf Landon Lecture Series (prestigious lecture series)
• Library of Congress Webcasts (sciences and the humanities)
• MediaSite (how to videos by “experts”)
• Michigan State University, Celebrity Lecture Series (a collection of various celebrity lectures from MSU)
• Mind Online, Lecture Series, (from the University of Chicago)
• MIT Open Courseware
• MIT Open Courseware, courses by category
• MIT World, Multimedia Lectures
• Open Courseware Finder
• SciTalks (well known scientists and leaders in the sciences)
• Stanford Business School Faculty Lectures
• Stanford Presidential Lecture Series (prestigious lecture series)
• Voices from the Smithsonian Associates
• WGBH Forum Lecture Series (lectures by experts in the sciences and the humanities)
• WGBH Forum Lecture Series, by Category
• World Lecture Hall (collection of video lectures, from the University of Texas)