OER -- Open Educational Resources are free and openly licensed educational materials that can be used for teaching, learning, research, and other purposes. Open resources can often be adapted, adjusted and modified to fit specific requirements and needs.OER resources are meant to be flexible and editable as long as you give credit to the original source and make the revised resource available under the same license as the original resource.
Main points about OER
You can use the Google Image Search option to locate open/free images on the Internet.
Note: Once you find an image you want to use using the Google Image Search, visit the site to verify the Creative Commons License or user permissions.
You may find it easier to search websites and domains using the Google Advance Search option. Rather than going to each individual site, try searching the various sites using Google. This may save you some time.
Some of the repositories have specific instructions for saving, downloading and importing content, make sure you check and follow those instructions if indicated.
Link with Instructions for downloading images from Flickr.
When using images to share content and information, you should include short text descriptions for people who cannot see the images. You can do this by using the “alternate text” or “alt text" option when uploading images in Blackboard and some other content management platforms.
Open Washington explains ways that you can make sure your images are more accessible.