This paper published in the Illinois Science Teachers Association Journal Spectrum describes a collaboration between researchers at the University of Illinois-Chicago and four middle grades science teachers from the Chicago Public Schools. They describe their use of My World GIS to teach Earth Science topics and the curriculum units they developed.
Click here to read their paper (posted here by permission of ISTA Spectrum):
Radinsky, J., Alamar, K., Leimberer, J. Rodriguez, C. Trigueros, J. (2006). Science Investigations with GIS: Helping Students Develop the Need to Know More. ISTA Spectrum, 31 (2). pp. 34-42.