Open Data in education is obviously fraught, as in health, b/c a lot of key/interesting data is PII, and so restricted to schools and contracted vendors and researchers. Releasing that data, even in aggregate form, turns out to be expensive and time consuming - so certain kinds of data aren't often available or used effectively as open data sets..
With that preamble, I've worked on the problem of opening up metadata about learning resources. We've barely scratched the surface but some related projects are: GoOpen and Learning Registry.
I'm also working on the Credential Transparency Initiative which is designed to open up data about credentials which can be earned (incl plumber's certificate and PhD in Astrophysics).
I'm working with a non-profit called UnboundEd on opening learning resources themselves. There are issues here are opening the data while presenting the resources with a coherent structure. Opening data permits local agencies and teachers to adjust the materials to their local circumstances, and use the tools they choose to manage and deliver the resources, but if the data aren't inclusive of sufficient context it becomes hard to say that the sharing of open data is doing much good.
All of the above are partial solutions, but all depend on open data or information of one kind or another in education.. I hope that's helpful!