The impulse to investigate the natural world is deeply rooted in our earliest childhood experiences. This notion has long guided researchers to uncover the cognitive mechanisms underlying the development of scientific reasoning in children. Until recently, however, research in cognitive development and education followed largely independent tracks. A major exception to this trend is represented in the multifaceted work of David Klahr. His lifelong effort to integrate a detailed understanding of children's reasoning and skill acquisition with the role of education in influencing and...