The Creative Commons search tools CC Search and Let's CC do not cover all image resources. See below for specialised, publicly available sources with more refined search options.
Jump to: Photographs, Clip Art, Other Public Domain Image Sources.
Other Public Domain Image Sources
Warning Don't assume that results from CC Search or Let's CC can be legally used for your purposes. Verify that the item you want to use has a suitable CC license by following the link provided to the site on which it was originally used.
Remember since you are working in an academic environment referencing will ALWAYS be required. Referencing means you are covered in relation to copyright and plagiarism by acknowledging the resource is not yours and it also helps you or someone else find it again if required. For more information on copyright and referencing have a look at the above tab called APA Referencing
YouTube Videos can only be downloaded if they have a Creative Commons license. To find CC videos, click the “Filter” tab at top left and look for the “Creative commons” option, or use CC Search. To view licence details for a video, click the "Share" button, then look for "SHOW MORE". Some also allow remixing and will link to a video editor.
Khan Academy Videos can be used under a CC BY-NC-SA licence. Provide the attribution statement “All Khan Academy content is available for free at www.khanacademy.org”.
Academic Earth Free educational videos from the world's top universities.
TED-Ed Educational videos created by TedEd collaborators or by teachers who have added supplementary content to YouTube videos.
Videezy Free background video footage, mostly scenic.