Introduction Beginning in 1998 the educational outreach group for NASA's Landsat 7, at the request of Project Scientist Darrel Williams, began to develop an educational unit for the Landsat Project Office (LPO.) The educational outreach group created and field-tested middle school and high school educational modules, which effectively have students use Landsat data in a variety of classroom projects. The resulting product is an interdisciplinary project designed to give teachers and their students the opportunity to develop and explore the uses of 30 years of Landsat satellite data. It was quite a task to find a broad-based application of Landsat data that students could study with some ease and would spark their interests. One of the NASA funded projects served as a perfect model. Investigators from the University of Maryland College Park Geography Department utilized historical and current Landsat data to map the patterns of urban growth and sprawl in the metropolitan area surrounding Washington D.C. (for additional information see: Growth Patterns of Urban Sprawl: How do zoning policies and environmental pressures influence the expansion of urban populations?).    Urban growth in the Washinton, DC Metro area The University of Maryland investigators worked on the premise that vegetative decrease in an area could be used to identify the location, timing and extent of urbanization. Through meetings with two of the investigators, Jeff Masek and Frank Lindsey, it became clear that students could, with some training in basic remote sensing techniques, use satellite images to help them understand their local area and how it had changed over the years. This unit was designed to be presented on the web. It was also developed to support existing curricula while promoting student inquiry. The seventh grade teachers at the Queen Anne School of Upper Marlboro Maryland, worked together to create and implement this interdisciplinary project in the Spring of 1999. The resources that were collected and the lessons that were developed through that collaboration have been incorporated into this web-based unit.   On this web site, teachers and students can find supporting background information, lessons for an interdisciplinary project, the required data sets, and various appendices that expand this project. Each of the links on this web site is designed for to make implementation easy for both teachers and students. Next: Teacher Intro