The teaching of secondary mathematics, by Charles H. Butler [and] F. Lynwood Wren. Butler, Charles H. (Charles Henry), 1894- Wren, Frank Lynwood, 1894- joint author. Mathematics Study and teaching (Secondary) QA11 .B88 1960 510.7 BUT Includes bibliographies. New York : McGraw-Hill, 1960. 1960. 1960 Text ix, 624 p. : eng McGraw-Hill series in education Curriculum and methods in education