This chapter of the "Biennial Survey of Education in the United States" is concerned with the topic of the professional education of teachers. Current problems in the education of teachers that are of chief interest, as judged by returns from nearly 100 teacher-preparing institutions and from State departments of education, and by general discussions to be found in the literature of the field, may be grouped under the following topics: (1) Teacher supply and demand; (2) Certification of teachers; (3) Overhead and internal administration and control of teacher-preparing institutions; (4) Problems of finance; (5) Institutional staff problems, including selective admission; (6) Curriculum construction and revision; (7) Student teaching and the training school; and (8) Education of teachers in service. Since developments during the short period of the biennium are too limited to permit the discovery of many distinct trends that will throw light upon the possible solution of problems indicated above, and furthermore since the present year marks the end of a decade of significant and noteworthy changes in the field of teacher education, the conclusions in this survey chapter will in many cases be based upon data covering a 10-year period, or upon an 8-year period when data for the year 1930 are not available. (Contains 4 tables and 3 footnotes.) [Best copy available has been provided.]