The TEACH Act, codified as Section 110(2) of the Copyright law, was designed to make the virtual classroom more similar to the face-to-face classroom. It addresses the performance and display of materials transmitted online, even if portions of the class are offered face-to-face.
The Act allows teachers to show online the full performance of a nondramatic literary or musical work, but they may display online only "reasonable and limited portions" of dramatic works, including audio/visual works, musicals, operas, commercial videos, and music videos. (Teachers in face to face classrooms may display these works in their entirety.) "Reasonable and limited portions" are not explicitly defined in the law, but the Fair Use Guidelines for Educational Multimedia recommend no more than 10% of a motion picture. Use only the portions that are necessary to make your point.
Teachers must have permission or licensing to display materials that students are commonly expected to purchase, such as textbooks, coursepacks, workbooks, and digital instructional materials made for the purpose of performance or display for use in mediated instruction.
Obligations of the teacher under the TEACH Act:
(2nd example from NCSU)
The University of Missouri meets the institutional criteria required by the TEACH Act.