Fair use is complicated—but you can also call on the principle of “classroom use.” Ask Ms. Sims for a quick working definition of fair use—when it’s OK to use copyrighted material without permission—and she just chuckles. “There is no such thing as a quick working definition of fair use,” she says. The shorthand she sometimes uses is that fair use “is the breathing space for freedom of expression within copyright law.”

(Source: lisnews.org)