Though it is easy to find and use images, music, and videos on the Internet, we must be careful to respect the intellectual property rights of others.
Whenever possible, use only images that:
You have gotten permission to use from the creator or owner, or,
Have permission to use built into the license
Fair use guidelines allow students to use parts of creative works in their school assignments. However, You will always need to provide a citation or attribution for images, even if you have permission to use them.