Sections 110(1) and 110(2) of the copyright code allow for use of copyrighted materials in the course of face-to-face and online teaching activities without obtaining permission. See Duke University's page on what is and is not allowed under these exceptions. Also, the education exemptions etool from the Copyright Advisory Network will help you determine whether your intended use is allowed under these sections of copyright code:
The four determining factors below are taken directly from the text of section 107:
There are three major exceptions that the Baker Library and the Archives take advantage of.
Other limitations to the copyright law are spelled out within the law in sections relating to certain performances, secondary transmissions, ephemeral recordings, computer programs and satellite carriers.