I am leading a MOOC (massive open online course) this Spring. The sign-up is open January 17-22 at P2PU School of Math Future:
http://p2pu.org/en/groups/ed218-developing-mathematics-the-early-years/

The course is offered for credit to Arcadia University students, and for School of Math Future completion certificate to everybody. It has the following overarching themes:

- Personally meaningful and relevant mathematics achieved through projects, games, problem-posing and problem-solving.
- Computer-based mathematics, including interactive simulations, modeling tools, solvers, and children programming platforms.
- Lifelong learning for teachers, with the focus of online communities and networks for teacher support, and building your personal learning networks

You can learn more about MOOCs here: http://en.wikipedia.org/wiki/Massive_open_online_course

Join the adventure, and spread the word!