Use the subject-based navigation tabs on the left to go to lists of image databases related to those subjects. Generally the subscription-based databases are separated from the websites. All sources provide images for educational use (papers and presentations), but remember to provide appropriate citations and source information. Check copyright status or license restrictions before publishing or posting any images to websites.
If you have any questions about finding and using images, please contact firstname.lastname@example.org.
The "All About Images" research guide will help you find the right tool for your project and will help you use it.