This brings me back to technology. Technology can provide efficient access to content but it teacher must manipulate the technology to fit the student, the curriculum. Google can provide factual information on almost any topic, but without design, those facts remain a pile of useless lumber. A simulation could be effective at addressing a common scientific misconception. The students could use it to test their prior knowledge, gather data to find a pattern or model a complex scenario. Without a design, however, the students will “play” but fail to develop a robust understanding. Too often the lesson is built around the technology rather than the technology helping to build the lesson.