Nonprofit educational uses are favored over commercial uses. Nature of work used. This factor examines the characteristics of the work being used. Courts more readily favor the fair use of nonfiction, rather than fiction and consider that unpublished materials may weigh against fair use. Amount of use.
Amount is measured both quantitatively and qualitatively.
No exact measures of allowable quantity exist in the law. Effect on the market. If you make a use for which a purchase of an original should have occurred, then this factor may weigh against fair use. Reproduced publications of significant amounts of textual material in the format or page layout in which it was originally published elsewhere. Reproduction of graphic or pictorial works unless this clearly advances your educational or research objectives.