Section 110 of the Copyright Law of the US allows for teaching performances and displays of protected works in a face-to-face classroom setting. Such works include the showing of a film, playing music, performing a play, or projecting images, and other types of performances and displays of copyrighted works in the classroom, as long as the work was lawfully acquired.
University of Texas
Copyright Crash Course — The TEACH Act
University of North Carolina
Comparisons of TEACH Act Sections 110(1) and 110(2)