Of the liberal movements dominating the thought of the world today, the greatest of all is the sweep of education. No phrase or dissertation can compass the entire scope or catch all the essential elements of the newer education that is shaping itself. But everywhere one direction is apparent: The trend of education is toward the people in mass and group without regard to condition, class, or circumstance; toward men, women, and children as human beings having without distinction full claim on equal opportunity to enjoy the benefits of art and science. Literature, history, philosophy, all of the subjects that were once studied by a privileged few, are now being sought by a rapidly increasing number who have but recently acquired some leisure. The people are calling for knowledge, for that education which opens the door to complete living. "Educational extension" is one of the terms that has been applied to the movement. It has come into use in the United States to describe the numerous ventures designed to meet the demand for knowledge and training. Educational extension includes many devices and instruments of instruction. The purpose of this bulletin is to give information on a subject of the university extension movement. Contents include: (1) University extension--development and definition; (2) History of university extension; (3) Relation between the English and American movements; (4) The war and educational extension; (5) Federal division of educational extension established; (6) National association incorporated; (7) Essential elements of university extension; (8) Institutions pursuing several activities; (9) The content of extension; (10) The extent of extension service; (11) Directory of general extension services; (12) Notes in State university divisions; (13) General extension in agricultural colleges; (14) The organization of extension work; and (15) List of extension publications. An index is included. Individual sections contain footnotes. [Best copy available has been provided.]