Thomas R. Tretter

SEEING THE SOLAR SYSTEM THROUGH TWO PERSPECTIVES: Upper Elementary Students Explore Earth and Space Science by Modeling and Observing Patterns

Mark Duckwall, Bill R. Thornburgh, Thomas R. Tretter, 2015 .

Seeing the Solar System through Two Perspectives. Part 2 of a Series Focusing on Learning Progressions.

William R. Thornburgh, Mark Duckwall, Thomas R. Tretter, 2015 .