Vol. 10 Num. 2 (1990) Richard Shumway Supercalculators and the curriculum2 Deborah Ball Breaking with experience in learning to teach mathematics: the role of a preservice methods course10 Herbert Zeitler Axiomatics of geometry in school and in science17 Stephen Lerman The role of research in the practice of mathematics education25 Alton T. Olson Mathematics as an infinite game29 Charalampos Toumasis Peer teaching in mathematics classrooms: a case study31 Michael Otte Intuition and logic37