Determining Fair Use
Usage of images may necessitate getting permission from the copyright holder or it may fall under Fair Use. You can determine if your situation qualifies for Fair Use by applying each of these four factors:
Information that will help you evaluate these four factors is available on the web:
Images from Google
A Google search can be a great way to find images, but many of these images are under copyright and should not be used freely. Before using images found through Google you should review the 6 Best Practices for Legally Using Google Images.