Presents a framework for teaching epidemiology to middle school students. The curriculum, "Detectives in the Classroom," addresses five essential questions: 'Why Are Some People Getting Sick While Others Remain Healthy?;''Is There an Association between the Hypothesized Cause and the Disease?;''Is This Association Causal?;''What Should Be Done When Preventable Causes of Disease Are Found?; and 'Did the Disease Prevention Strategy Work?' (SM)