Excellent article by Porcello and Hsi in Science (19 July 2013): how to crowd-source and curate online education resources, in this case for STEM. There is so much out there...how do you decide which collection(s) to search, use, and perhaps contribute to?
One thing that would be very helpful: create and use common metadata for these online resources - now searches and queries can be expected to yield more accurate and consistent results across OERs.
Here are a few examples of STEM OERs:
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