The amount and substantiality of the portion used in relation to the copyrighted work as a whole;
Fair use consideration is judged in a primarily qualitative rather than quantitative method, so specific content limitations on the amount used is not precise. Generally, the less used the more likely it can be counted for fair use. Also, consider the portion amount in proportion to the total amount.
Tips and core concepts:
Professor Chen is teaching an online course titled Frontiers in Biotechnology. This week's topic concerns the use of genetic information in the context of personalized medicine. Professor Chen would like students to read this article:
Gholson J. Lyon, "Personalized medicine: Bring clinical standards to human-genetics research." Nature 482 (16 February 2012): 300-301. doi:10.1038/482300a.
Professor Chen downloads the article PDF and posts it to Sakai for students to read. Is this fair use?
Professor Chen does not need to rely on fair use in this case because the University X has a site license to Nature online that allows the university to make the licensed content available to authorized users for the purposes of research, teaching, and private study. This includes the right to reproduce individual articles for distribution to students as course readings and to create hypertext links to the licensed content as long as access is restricted to authorized users. Authorized users are defined as faculty, staff, enrolled students, and walk-in users of the library.