If you still aren't getting good results, contact your liaison librarian.
These search tools can help you find high-quality OER in any subject area.
Creative Commons Search allows you to select
a range of openly licensed media types and general sources.
Note: Creative Commons offers licenses with various degrees of openness. The most open license is CC0.
Google Advanced Search can help you find resources
licensed under a Creative Commons license.
YouTube Search can help you find videos licensed under a Creative Commons license.
A general Google Search is useful when you need to broaden your search.
It will return a vast array of resources that may require significant sifting
to yield useful results.