This manuscript on mathematics was prepared by Dr. Edwin S. Lide, one of the full-time workers on the Survey. It gives attention to courses of study mostly in mimeographed form which he succeeded in obtaining and to personal visitations which he made to the various schools. It covers the work in the junior high school and in the senior high school. The wide effect of the National Committee on Mathematics on the courses of study and on practice are here recorded. This monograph contains the following chapters: (1) General characteristics of outlines of courses; (2) Mathematics in junior high school grades; (3) Mathematics in senior high school grades; (4) Influences on the production and use of courses of study; and (5) Summary and conclusion. Individual chapters contain footnotes. (Contains 1 figure and 13 tables.) [Best copy available has been provided.]