Copyright law provides for the principle, commonly called "fair use," where the reproduction of copyright works for certain limited, educational purposes, does not constitute copyright infringement. The Copyright Act establishes a four factor test, the "fair use test," used to determine whether the use of a copyrighted work is fair use and does not require the permission of the copyright owner. The fair use test is highly fact specific and much can turn on seemingly insignificant variations on the proposed use. For details on the "fair use test," please visit The University of Chicago's Copyright Information Center site.