Academic Earth

Carnegie Mellon Open Learning Initiative

Chengo Chinese

Citizens All: African-Americans in Connecticut, 1700 - 1850 (Yale)

Connexions (Rice University)

History Matters (Graduate Center, CUNY and George Mason University)

Interactive Science Simulations (University of Colorado)

Johns Hopkins Bloomberg School of Public Health's OPENCOURSEWARE

Khan Academy   Intro Video

MIT - High School Courses Developed by MIT Students

MIT OCW Scholar

MIT OpenCourseWare (OCW)

MIT World

Monterey Institute for Technology and Education

Notre Dame OpenCourseWare

NSTA Learning Center

OCW Course Finder (Search for free online courses from prestigious higher education institutions around the globe)

Online Access to Research in the Environment (United Nations Environment Programme (UNEP), Yale University, leading science / technology publishers)

Online Courses / Videos (AcademicInfo)

Open Educational Resources (Internet Archive)

Open Learning Initiative (Carnegie Mellon University)

Open.Michigan (University of Michigan)

OpenStudy (get live help from other students)

Sofia Open Content Initiative (Foothill College)

Stanford U on YouTube

Teachers' Domain

Teaching American History (170 American history lessons for grades 5-12 ) (EASTCONN)

Theses, Dissertations and E-Prints

Tufts

UC Berkeley

UC Irvine OpenCourseWare

Utah State OpenCourseWare

Yale