After the first observations of life under the microscope, it took two centuries of research before the "cell theory" was established. Fortunately, today's teachers can take advantage of computer technology and speed up the discovery process in their classrooms. This article presents several new computer-mediated instructional programs that are designed to teach students about the complex “world of cells.” Viewed collectively, these instructional programs have the potential to not only have a positive influence on students’ conceptions of cells, but also to enhance their understanding of the intimate relationship between form and function, as well as the value of using models to learn about basic biology.