This resides within the Internet Archive and is an index of more than 1.7 million video clips!

Pixabay hosts thousands of high-resolution, public domain images!

This database has over 1.2 million images. EACH IMAGE HAS DIFFERENT LICENSING, SO LOOK CLOSELY. Supporting units: famous Americans, presidents, civil rights, wars, inventors, authors, and just about any American historical event.

Public images archive for free photos. No copyright. No attribution required.

The site has an extensive collection of space images for students to download.

This site has beautiful, high resolution photos. Supporting units: animals, adventure and exploration, history, landscape, nature and weather, people and culture, science, space, underwater.

The Smithsonian has a large collection of historical photographs that students may use freely for projects.

This site offers an encyclopedic collection of images.

A site that offers artistic high quality images. Supporting units: transportation, food, landforms, geography, art, aircraft, plants, penguins, Spring.

A public domain gem of clipart, diagrams, sketches, and more for the classroom. Supporting units: ancient civilizations, world religions, musical instruments, art, fairy tales, Native Americans, explorers, Civil War, geography, food, architecture, Shakespeare, plants, holiday. 

This is another great image site, offering a wide variety of images. Supporting units: geography, landforms, food, space, plants, ocean, grammar, animals.

One of the best public domain photo image sites. Images are high quality, high resolution, and offer an artistic approach. Contains advertising (Google) that can be distracting. Supporting units: geography, landforms, world religions, art, food, insects, plants, grammar (using images to represent parts of speech).

This site contains photos donated by amateur photographers and teachers to help educators improve their curriculum. Supporting units: biomes, animals, art, food, world religions, fractals, holidays, space, landforms, geography, Native Americans, colonial America, Civil War, ancient civilizations, mythology, presidents. 

This site provides free, high-quality music in a wide range of genres, and the content is under various creative commons licenses. Anyone can download FMA music for use in podcasts, videos and other digital presentation formats.

Free and legal music downloads.

This websites provides a full range of music genres.

This unique website provides a wide range of sounds, mechanical to nature, in addition to music tracks.

Provides 23 recording categories of common sounds like doorbells ringing, dogs barking, cars honking, etc. You have to register, but once you do you can use the sounds over and over.

This features collections, of images, books, essays, audio recordings, and films that are in the public domain.