Project 2061, the science education reform initiative of the American Association for the Advancement of Sciences (AAAS), will identify and translate into classroom materials a range of weather- and climaterelated phenomena and representations based on data from NASA's earth observation systems. The objective is to improve middle school students' understanding of important ideas that provide a foundation for more advanced study of global climate change and its implications in high school. AAAS also aims to expand the instructional use of NASA-related scientific data, simulations, animations, and other types of representations. Using an iterative design process, we will work closely with NASA's Giovanni, NEO, and MY NASA DATA programs to identify appropriate weather and climate phenomena and representations around which to design learning activities. Teachers and students in Montgomery County (MD) Public Schools, Denver Public Schools, and schools in the New England region will participate in the development process through focus groups, interviews, and pilot and field tests of draft activities and teacher support materials.