This paper provides an account of the instructional design and development process used by a team of students enrolled in a graduate level course in distance education as the team members conceptualized and created two prototype World Wide Web-based instructional modules, aimed at grades 5 through 12, for the Lunar and Planetary Institute's Mars Millennium Web site and CD-ROM project to support the National Aeronautic and Space Administration's Jet Propulsion Laboratory. The paper is intended to serve as an instructional design blueprint for other curriculum designers and educators to use, should they encounter a similar need for interactive Web-based curriculum based on scientific theory and data, which incorporates a variety of emerging technologies, Internet tools, and innovative instructional strategies. (Author/MES)