At the beginning of the school year I like to introduce my 8th graders to think like a scientist. I give students an Ob-Scertainer (http://www.flinnsci.com/store/Scripts... ). It's a great way to discuss what observations, predictions, hypotheses and results are. It also leads to a good discussion of the significance of results. I want to thank the teachers that volunteered to be my "students" for this video.