Thirty papers are presented from a symposium devoted to the problems of the main trends in the research of the content and methods of inservice teacher education. Symposium participants represented the educational systems of Bulgaria, Hungary, East Germany, Poland, Cuba, Romania, the Union of Soviet Socialist Republics, and Czechoslovakia. In all countries whose representatives attended the Symposium, a unified system of inservice education of teachers and other educational personnel has either already been established or is in its initial state. The participants in the Symposium assessed certain results of scientific research of inservice teacher education which appear to be topical and useful. Emphasis of the Symposium was on the development of a unified, internally differentiated system of inservice education of educational personnel in the socialist countries. (JD)