Introduction / G.T. Buswell -- Arithmetic in the elementary-school curriculum / Ernest Horn -- The nature and sequences of learning activities in arithmetic / Harry G. Wheat -- Arithmetic for preschool and primary-grade children / Esther J. Swenson -- Arithmetic in the middle grades / C.L. Thiele -- Arithmetic in the junior-senior high school / H. Van Engen -- Learning and teaching arithmetic / Herbert F. Spitzer -- The psychology of learning in relation to the teaching of arithmetic / G.T. Buswell -- Instructional materials for teaching arithmetic / Foster F. Grossnickle, et al. -- Testing instruments and practices in relation to present concepts of teaching arithmetic / Herbert F. Spitzer -- The training of teachers of arithmetic / Foster E. Grossnickle -- Mathematical background needed by teachers of arithmetic / C.V. Newsom -- In-service development of teachers of arithmetic / D. Banks Wilburn and G. Max Wingo -- The social point of view in arithmetic / B.R. Buckingham -- Needed research on arithmetic / G.T. Buswell