For the last while, I've been working with Yaron Koren to produce an extension for Mediawiki (called HTML Tags) that can support the use of LRMI (a metadata framework for describing online educational resources,) as well as other metadata schemas built off of Schema's common frame. You can see an installation of HTML Tags on the LRMI referata demo wiki . The installation is set up to use the LRMI specification, including the schema.org terms mentioned. The two easiest ways to add LRMI data to articles in it is either to use the LRMI button added to every page, or just add the {{LRMI-object}} template manually. Feel free to mess around in the demo wiki if you're curious about it. (Our work on HTML Tags has been funded by Creative Commons as part of the broader LRMI project.)

Outside of things related to LRMI, I've been contributing to Wikimedia projects for the last few years as User:Maximilianklein, and off and on anonymously before that. Acting as Wikipedian in Residence at OCLC (who has no connection to this project,) I helped initiate a proposal that led to the integration of data from OCLC's Virtual International Authority File with Wikipedia's pre-existing authority control system. I've also been pretty heavily involved with educational projects in the past - I used to be Regional Ambassador for New England in ENWP's education program, and also previously instructed a class that was part of ENWP's education program at UC Berkeley.