Miscellaneous learning sites I don’t want to lose

Every so often this weblog’s primary purpose for me is simply to hold onto web sites that I don’t want to lose. I’ve long since given up on bookmarking (the lists get too long), and anyway, the moveable type weblog software I use has a speedy search mechanism in it. All of which is by way of introduction to these sites, which I don’t want to lose: the problem-based learning site Mary wrote about, the “Understanding by Design” exchange (even in demo mode), the indicators of understanding by design, and a media literacy film site.