Educational Use of the Internet
The Educational Use of the Internet amendment to the Copyright Act permits you to download, save, and share publicly available materials on the Internet for non-profit, educational purposes. Materials include Internet text, images, music recordings, audiovisual works, theatrical performances, instructional demonstrations, etc., that were intended to be freely downloaded and distributed. You must provide bibliographic information (cite your source).
Notwithstanding the Educational Use of the Internet amendment, you must respect the rights of those creators and other copyright holders who post materials on-line for commercial purposes. Materials on the Internet that are not publicly available include those with technological protection measures such as a password or encryption, a clearly visible notice prohibiting educational use, or a licensed commercial database.