GEMS leader's handbook - Barber, Jacqueline; Lawrence Hall of Science; GEMS (Project). (Berkeley, CA Great Explorations in Math and Science (GEMS), Lawrence Hall of Science, University of California, 1997)
Reprinted with revisions.
"The second and third editions of the GEMS Leader's Handbook were revised by Jacqueline Barber, Lincoln Bergman, Kimi Hosoume, Cary Sneider, and Carolyn Willard." -- T.p. verso.
Keywords: Mathematics -- Study and teaching (Elementary).; Science -- Study and teaching (Elementary).