Conformity with copyright restrictions for any class is the responsibility of the instructor.
In order to comply with the fair use provision of Section 107 of the copyright law (Title 17, U.S. Code), you cannot. . .
You may always...
When you copy print materials, please be sure to include all source information.
When you duplicate/present material electronically, you should attempt to not only include the copyright information for your students but also to embed it into the document/presentation produced.