Reviewed are the contributions of Gerald Spellman Craig to the field of elementary school science. Included are Craig's viewpoints on criteria to be used in selecting natural science objectives, examples of general and specific objectives that fit each of the criteria, and his ideas about content, its organization, and sequencing. (CS)

Discussed is Bertha Morris Parker's contribution to elementary school science curriculum in terms of her development of science curriculum, her insights and ideas about elementary school science, and elementary school books she wrote. (DS)

Describes the contributions of Anna Botsford Comstock to the development of elementary-school science. She played a major role as one of the developers of the nature-study program for children at Cornell University. Her biography and a list of her publications are also included. (HM)

This essay is the third in a series on innovators in the teaching of elementary-school science. Palmer's ideas and work on nature study and their relevance to children's education are described. His resume and a list of his publications are also included. (HM)