Academic Earth: Academic Earth is a collection of free online college courses from the world’s top universities including Columbia, Harvard, Princeton, Stanford, and Yale. Their curated lists of online courses are hand selected by their staff to show the best offerings by subject area including art, business, engineering, math, medicine, science, and social science.

C-SPAN Classroom: Free video-based materials for social studies teachers. Free membership gives educators access to their own library to store C-SPAN Classroom video clips, and supplementary materials such as lesson plans and handouts.

Documentary Heaven: Documentary Heaven is a website filled with thousands of free online documentaries just waiting to be seen. The site is continuously updated on a daily basis.

Explore: Explore.org is a multimedia organization that documents leaders around the world who have devoted their lives to extraordinary causes. Both educational and inspirational, Explore creates a portal into the soul of humanity by championing the selfless acts of others.

Free Video Lectures: Free Video Lectures is a library of video lectures from courses offered by some of the world's top colleges and universities. The library of videos can be searched by subject and or university.

How Stuff Works: How Stuff Works is the award-winning source of reliable, easy-to-understand explanations of how the world actually works. The material is organized into different categories such as adventure, auto, health, science, and tech.

Khan Academy: Learn for free about math, art, computer programming, economics, physics, chemistry, biology, finance, history, and more. Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empowers learners to study at their own pace in and outside of the classroom.

Math A Tube: The Math A Tube website is dedicated to helping parents and their kids with math. Access free video lessons, worksheets, tables, charts, formulas, and symbols for all math subjects and all grades.

MonkeySee: MonkeySee captures the skill and knowledge of the world’s top experts and delivers it to inquisitive audiences everywhere. Combining technique, technology, and storytelling, MonkeySee gives you access to thousands of premium lifestyle, DIY, advice, and how-to videos.

NeoK12: NeoK12 features educational videos and animations to help kids understand concepts, spark curiosity, and encourage self-learning. The site also features innovative tools for learning and teaching.

Next Vista for Learning: Founded by Rushton Hurley, Next Vista for Learning is an alternative to YouTube and houses a free library of videos by and for teachers and students. The site is focused on helping teachers and students share insights creatively using technology.

ReadWriteThink: ReadWriteThink.org provides teachers and parents with access to the highest quality practices in reading and language arts instructions by offering the very best in free materials. The site offers lesson plans, student interactives, printouts, and booklists.

Science Kids Video: Science Kids provides educational resources for teachers and parents that help make science fun and engaging for kids. The site offers fun science experiments, online games, free activities, ideas, lesson plans, photos, quizzes, videos, and science fair projects.

TedEd: Ted-Ed is TED’s youth and education initiative and is an award-winning education platform that serves millions of teachers and students around the world every week. They have a growing library of original animated videos and an international platform for teachers to create their own interactive lessons.

Vimeo: Vimeo is an ad-free video-sharing website where users can upload, share, and view videos. Vimeo offers a clean layout with larger videos and less clutter around the frame.