OER Commons & Open Education"From a single point of access in OER Commons, you can search, browse, and evaluate resources in OER Commons' growing collection of over 50,000 high-quality OER."
The OER Commons is a single search source that pulls from multiple OER collections, including MERLOT and Connexions. It is a great first step in an OER search, but often more results can be found by searching the specific collection.
The OER Commons is a supported by ISKME (the Institute for the Study of Knowledge Management in Education).