Legal doctrine that allows quotation of copyrighted material for academic or review purposes, with a limited number of words (the limit is not specified by law, and is subject to the court's judgment about its fairness).
Section 107 of the Copyright code (commonly called Fair Use) limits the rights of the author, allowing parts of a copyrighted work to be used without requesting permission. Such circumstances are limited to criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research. Nevertheless, Fair Use is NOT carte blanche to use any amount of a copyrighted work for any amount of time just because it is "for educational purposes." The government has very strict guidelines on how much can be copied and used in the classroom and for how long. For more information, see the Washburn University Faculty Handbook Appendix VII: Agreement on Guidelines for Classroom Copying.
a provision within US copyright law that permits the limited use of copyrighted material for teaching, commentary and criticism purposes. The four factors considered to determine fair use are the purpose of use (as in for profit or not), the nature of the material used, how much of the original material was used and the effect of its use. The last point attempts to determine if the creator of the work was deprived of sales or economic benefit. Additionally, just acknowledging the source of the information does not constitute fair use. Permission must still be obtained to use copyrighted material.