Student at Watkins Elementary School, Washington, DC, works on an activity from Chemical Tests , a third-grade STC unit. Cover and p. 102. Students at Watkins Elementary School, Washington, DC, work on an activity from Chemical Tests, a third-grade STC unit. Cover and p. 173. Fairfax County, VA, high-school student.
Teacher demonstrates pendulum.
David Powers, courtesy University of California, San Francisco. Children on statue of Albert Einstein in Washington, DC, at the National Academy of Sciences. Barry A. Wilson. Students at Long Branch Elementary School, Arlington, VA, work on an activity from Sounds, a third-grade STC unit. First-grade students at North Frederick Elementary School, Frederick, MD, examine quail hatched in the classroom.