The “Technology, Education and Copyright Harmonization Act,” commonly known as the “TEACH Act,” was enacted by Congress on October 4, 2002. It is a full revision of Section 110(2) of the U.S. Copyright Act. Its provisions enable educators to use copyrighted materials for distance education, with certain restrictions.
The Teach Act was created as a part of the Digital Millennium Copyright Act to address the evolution of digital information and to support online learning. Part of that is extending the classroom to the digital environment. And most importantly, for a use to be allowed it does not need to meet both the factors of Fair Use and the TEACH Act, just one or the other.
ALLOWED use if all criteria are met
An overly simplistic interpretation is if you would have used the copyrighted work in a traditional classroom in front of students as part of a lesson, it can probably be done under the TEACH Act.