Earth, moon and stars teacher's guide grades 5-9 - Sneider, Cary Ivan; Great Explorations in Math and Science (GEMS) Project (Berkeley, CA Great Explorations in Math and Science (GEMS), Lawrence Hall of Science, 1998, 1986)
Reprinted with revisions, 1989,1992,1994,1996,1998.
Keywords: Astronomy -- Study and teaching -- Activity programs