Holiday Lectures on Science
Howard Hughes Institute. Webcast lectures, teachers' resources, archives.

The Vega Science Trust
A collection of video-on-demand science programmes, including lectures, discussions, workshops, archive footage, and science media links.

The Naked Scientists Online
A science, medicine and technology on-demand internet radio show containing a digest of science news stories in text and streamed audiovisual format and numerous interviews with famous scientists. From online scientists at Cambridge University

Offers to create visual materials on CD rom for presentions. Includes samples of work.