Teachers Pay Teachers is an open martketplace for educators who wish to share, sell, and buy resources, images, clipart, fonts, graphics and more created by fellow educators. The majority of this content is created specifically for instructional purposes rather than for student use. Users do not have to join to view content, but do need a free membership to download purchases. There is a huge gallery of free resources for download, accessed via the 'See What's Free' button on the homepage. In terms of copyright, an extensive FAQ page can be found here: http://www.teacherspayteachers.com/Copyright-FAQ. A truncated version of general copyright terms explains that, "A Creative Commons license is a simple legal document attached to the individual works of the Teacher-Authors which let Teacher-Buyers know what they can do with the work. For more on Creative Commons, see http://creativecommons.org/. There is a special Creative Commons area for Education uses: http://creativecommons.org/education/." Thusly, it is best to locate terms of use on a teacher by teacher basis.

A massive collection of digital reproductions of famous artworks, renderings of historical decorative objects, and more. Similar to the Getty's Open Content Program or Google Art Project, the National Gallery of Art's NGA Images site, "is a repository of digital images of the collections of the National Gallery of Art. On this website you can search, browse, share, and download," 37,000 open access images, many of which are featured at incredibly high resolution. Users can browse collections or perform an advanced search. NGA goes on to explain that it, "implements an open access policy for digital images of works of art that the Gallery believes to be in the public domain. Images of these works are now available free of charge for any use, commercial or non-commercial. Users do not need to contact the Gallery for authorization to use these images," but are asked to include the following credit when using the aforementioned images: Courtesy National Gallery of Art, Washington.

Beautifully rendered digital content including clipart, photos, fonts, templates, illustrations and more appropriate for student view and use but best suited to a teacher's purposes e.g. avatars for student labels or images for multimedia presentations. While the majority of materials on this site are not free, they DO offer free goods from featured artists every week! No membership fee is required. Content outside of the weekly features does cost money, but patrons are directly supporting, "independent creatives around the world," and are granted Creative Market's simple license with every purchase, the details of which can be found here: https://creativemarket.com/licenses/simple. Additionally, it is important to note that in certain cases, "portions of some products may be covered by an open source software license such as the GPL (GNU General Public License). In these cases, any portions of the product not covered by an open source license will be covered by this license."