Today I was working with a bunch of 5th graders and man, we were focused. We were so involved in what we were building on the computer (remind me to put a sample up here) that we lost track of time. We "lost" a whole 30 minutes! When I asked the students to quickly save, log off and get ready to go they actually thought I was kidding. Time flies when you are having fun, I guess. As a side note, I'm not sure there is much that makes me happier as a teacher as when students are actually disappointed that the class is over.