Teaching elementary school mathematics for understanding / John L. Marks , C. Richard Purdy, B. Lucien Kinney, Arthur A. Hiatt Marks, John L. Marks, John L. Teaching elementary school mathematics for understanding. Purdy, C. Richard Lucien B., Kinney Hiatt, Arthur A. Mathematics Study and teaching (Elementary) QA135.5 .M36 1975 372.7 MAT First ed. published in 1958 under title: Teaching arithmetic for understanding. Previous editions by J. L. Marks, C. R. Purdy, and L. B. Kinney. Includes bibliographies. New York : McGraw-Hill, 1975. 1975. 1975 Text viii, 406 p. : eng