I think they would get a lot more people if they made it easy to work on this part-time.

I, personally, would love to help teach a class in a high school or even a lower level, but I don't want that to be all I do. If I could come in for an hour or so a week, I would do it. (Actually I'm in college right now, but I would like to start doing that next year.)

Similarly, I would be happy to help out with educational technology, but I might not want to do that full-time (I might, but there are many factors that go into choosing a job - location, working conditions, and pay, to name three). I didn't know until I read this article that there are open-source projects that are used in schools that I could contribute to.