"Evaluate the use for each factor and then make a good faith determination as to whether the use, in light of all four factors, can be considered fair use. If it is not fair use and none of the other exceptions apply, then permission must be obtained to use the material."
"The Center for Media & Social Impact has created a set of teaching tools for professors who are interested in teaching their students about fair use. "
The best way to avoid copyright violations is to link to articles, books, and videos in the library catalog and databases; instead of making a copy and sharing that copy.