HippoCampus (Licences vary)
HippoCampus.org is a free, core academic website that delivers rich multimedia content—videos, animations, and simulations—on general education subjects to middle-school and high-school teachers and college professors, and their students, free of charge.
PhET Interactive Simulations (CC BY)
Free, interactive math and science simulations. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery.
The Open Goldberg Variations (Johann Sebastian Bach, BWV 988), played by Kimiko Ishizaka on a Bösendorfer 290 Imperial piano, are free to download and share.
Free Sound (Various CC licences)
A collection of searchable audio clips uploaded by users.
Flikr (CC search filter)
The Flickr Creative Commons Search allows you to search all of image sources for items that are either CC-licensed or public domain.
The Gender Spectrum Collection (CC BY-NC-ND)
A stock photo library featuring images of trans and non-binary models that go beyond the clichés. This collection aims to help media better represent members of these communities as people not necessarily defined by their gender identities—people with careers, relationships, talents, passions, and home lives.
The Noun Project (Various CC licences)
A catalogue of symbols that are created and uploaded by graphic designers under a CC-license.
A collection of free stock photos without copyright restrictions.
UBC’s Aggregated List of Image Sources (Licences vary)
A comprehensive list of image collections that are either in the Public Domain or Creative Commons licenced. The list includes multidisciplinary collections, as well as those specific to the humanities and sciences.
A collection of free high-resolution photographs that do not have any copyright restrictions.
U.S. Government Photos and Images (Public domain)
A vast collection of photos and images from the U.S. Government, many of which are in the public domain and free to use.
Wikimedia Commons (Licences vary)
Wikimedia Commons contains over 20 million freely usable image, sound, and video files.
BLOSSOMS Video Library (CC BY-NC-SA)
BLOSSOMS Video Library contains over 100 math and science lessons, all freely available to teachers as streaming video and Internet downloads and as DVDs and videotapes.
Pexels Videos (CC0)
A collection of free stock videos without copyright restrictions.
TED Talks (CC BY-NC-ND)
TED’s videos are all Creative Commons licensed, unless otherwise indicated.
A collection of 20,000 college lectures published by UCBerkeley.