The Learning about Learning-Technology-Design Project (L2TD) is the successor to the Trails Project, which I wrote about a couple years ago. It is essentially concerned with the same goals as this blog. I quote from the older TRAILS page:
aims to broaden and support the pool of talent available to address the needs of K-12 education by creating powerful technology in forms such as simulations, interactive drill and practice, adaptive tutorials, and virtual manipulatives.
It is about designing better and more interactive educational technologies. So far the L2TD project is really a collection of links to courses on the design of interactive learning software. So there are links to course syllabi, reading lists, and activity ideas. Some of the courses are oriented around game design, while others are more learning sciences focused.