Arithmetical abstractions
Subtitle: the movement toward conceptual maturity under differing systems of instruction
By: by William A. Brownell.
Series: University of California publications in education,; v. 17
Publisher: University of California Press
Published: 1967
Place of publication: Berkeley
Language: eng
Number of pages: 221
Subjects: Arithmetic -- Study and teaching (Primary)
Notes: "Research ... supported under contract no. 2-10-103 (project no. 1676) with the United States Office of Education, Department of Health, Education, and Welfare."