Open Educational Resources (OER) are educational materials (textbooks, lectures, worksheets, images, etc.) published in the public domain that may be freely used and shared. Many can be altered to fit your class. To know if you may alter the content, check the Creative Commons' licensing guide.
The benefits of using OER:
OER materials for higher education:
Search multiple collections at one time:
Other OER content:
Open pedagogy:
Creative Commons:
These websites and tools host educational videos, podcasts, and audio clips that can be embedded into Moodle classes.