I was checking out some math, physics and standards based grading educational blogs when I came across a screencast of a teacher who used DimDim. Check out the screencast here and see how it went. More info from the lesson is found here. I found the DimDim to be a bit slow paced, but maybe that’s just the nature of the beast when trying to broadcast live video. Dan, the teacher, also lamented that he found formative assessment very difficult.