Systems and methods are described for interactive, adaptive, customized and individualized computer-assisted instruction of students, preferably implemented on network connected computers. An assembly tool is provided for bringing diverse educational resources together to create customized course material for the instruction of students. A replication element is configured to update each resource and assure access to each updated resource. The system and method of the present invention responds to the instructor's creativity, allowing the instructor to shape and control the instructional materials and process, and allowing instructors from diverse institutions to exchange, share, modify and improve educational materials.