There is a controversy raging in the United States between proponents of the theory of evolution and advocates of special creation/intelligent design (ID). Evolution is the unifying theory of the life sciences and evidence supporting evolution comes from repeatable experimentation and observation. ID is a type of special creation, which is based on the Biblical creation account. Evolution and special creation are complex, formal, abstract concepts soundly understood by few. The current evolution-ID controversy stems, in part, from a lack of scientific literacy among citizens. Scientific literacy requires content knowledge and an understanding of the processes by which content is discovered. Teaching the controversy in the science classroom ...