These proceedings contain lectures concerned with problem solving, applications of undergraduate mathematics, and aspects of current research in mathematics. The four working groups considered: (1) the role of feelings in learning mathematics; (2) the problem of rigor in mathematics teaching; (3) microcomputers in teacher education; and (4) the role of microcomputers in developing statistical thinking. Additionally, the two topic groups considered natural language and mathematics in human evolution and gender differences in learning outcomes on the Second International Mathematics Study. (PK)