Computers in teaching science: To simulate or not to simulate?

Do computer simulations help students learn science? How can we tell? Are there negative implications of using simulations to teach students about real world phenomena? In this paper I describe my experience using a computer simulation on air resistance. In order to parse out the effects of using the computer simulation and of having an interactive learning environment, I compare two classes which both had interactive learning environments. One class used the simulation and the other class used only a set of paper and pencil activities. In the two different learning environments, there appears to be differences in how students approached learning. However, student performance on a common exam question on air resistance was not significantly different.