This Yearbook 1989-90 is made up of six articles. The articles depict the ongoing discussion taking place in Finland as it re-assesses the state of its mathematics education and planning measures for its development. The opening article presents an analysis of the president of the International Commission on Mathematical Instruction of some current trends in mathematics education. The following three articles represent then recent Finnish research on the area of mathematics education. The last two articles offer views about mathematics teaching and teacher education in Estonia and Czechoslovakia. The articles are: (1) Some Contemporary Tendencies in Mathematical Education (Miguel de Guzman); (2) Mathematics, Science and Technology Teachers' Conceptions about Their Professional Knowledge and Skills (Yrjo Yrjnsuuri); (3) Study Orientations of Mathematics by Upper Secondary School Students (Raija Yrjnsuuri); (4) "A Contextual Approach to the Teaching of Mathematics: Outlining a Teaching Strategy That Makes Use of Pupils' Real World Experiences and Strategies, and the Results of the First Teaching Experiment of the Project (Tapio Keranto); (5) Developments in the Teaching of Mathematics in Estonia (Olaf Prinits); and (6) The System of Teacher Education in Czechoslovakia with Special Reference to Mathematics Teachers' Education (Jaroslav Bartak). (MDH)