The twenty-first annual meeting of the Harvard Teachers' Association will be held in New Lecture Hall today. At 9.45 O'clock there will be a short business meeting of the association and directly after this the morning discussion will begin, taking for its topic, "Tests of School Efficiency." The first speaker will be Edward L. Thorndike '96, professor of educational psychology, of the Teachers' College, Columbia University, who will discuss the "Measurement of Educational Products." Leonard P. Ayres of the department of child hygiene, Russell Sage Foundation, will follow on the subject of "Measuring Educational Processes through Educational Results." A general discussion will then begin, led by Frank V. Thompson, '07, assistant superintendent of schools, Boston; Howell Cheney of the state board of enducation, Connecticut; F. E. Spaulding, superintendent of schools, Newton; and E. M. Hartwell of the statistics department, Boston. The morning meeting of the association will be open to the public. Teachers and school officers are especially invited.

Immediately after the meeting, the annual dinner for members of the association and their guests will be held in the Union at 1 o'clock. President Lowell will preside. "Tests of College Efficiency" will be the afternoon topic and the speakers will be Clyde Furst, secretary of the Carnegie foundation for the advancement of teaching, and Dean Gay of the Graduate School of Business Administration.