When developing and populating websites it is important to ensure that you have the right to re-use any content that is not your original creation. It is potentially a violation of the original author’s copyright to reuse materials, even those openly published on the web.
There is information provided by the UCSC team on copyright, as well as a very useful FAQ from UC. The Library also provides information on fair use. It is a common misconception that fair use will cover reuse in an educational setting. Be sure to review what UCOP has to say about fair use in research and the classroom.
If you use Google Image Search for an image, ensure you are searching for license-free images. In addition, here is a list of free image libraries as well as other resources and interesting websites about “open content.” Also, familiarize yourself with Creative Commons, that provides free, easy-to-use copyright licenses through Flickr and other platforms.