Instructional videos providing answers to common questions.

Thousands of video lectures from the world's top scholars.

www.academicearth.org

Short-form online video lessons by professional educators. Free math lessons.  

www.brightstorm.com

Aggregator of free, online video lessons and documentaries.

www.cosmolearning.com

Aggregator and host of educational videos.

www.edublogs.tv

High quality multimedia content ideal for use in the classroom.

www.thefutureschannel.com

Professional and user-generated how-to videos.

www.howcast.com

Free lectures, language lessons, audiobooks, and more accessible via Apple iTunes.

Apple iTunes - Apple iTunes Software

Professionally developed programming for K-12 classrooms.

www.learner.org

Professional video lessons in mathematics. Covers basic math through calculus.

www.mathtv.com

Lectures and course materials for students, teachers, and self-learners.

ocw.mit.edu  |  Also see: OpenCourseWare Finder

Guide to more than 700 interesting MIT lectures.

mitworld.mit.edu

Aggregator of high-quality educational videos from around the Web.

www.neok12.com

3,500 videos from distinguished researchers and scholars.

www.researchchannel.org

Free videos from your favorite PBS programs, including NOVA and Frontline.

www.pbs.org/video

Video sharing platform for schools featuring original content created by students.

www.schooltube.com

Library of free, full-length documentary films.

www.snagfilms.com

Online aggregator of educational videos.

www.teachertube.com

Fascinating presentations by the world's leading thinkers and doers.

www.ted.org

Comprehensive online directory of educational videos aggregated from across the Web.

www.watchknow.org

Free lectures from more than one hundred colleges and universities.

www.youtube.com/edu  |  Also see: Talks@Google