TeacherTube studycast: Rock meets Lichen

One of my friends is a middle school teacher who tries to find ways to usefully integrate technology with his teaching.  This is an animation his students made, "Rock meets Lichen"

http://www.teachertube.com/view_video.php?viewkey=b818fffa3e8045eb95a6

You can find all of their studycasts on his wiki at

http://studycasts.wikispaces.com/Studycasts