Vol. 14 Num. 1 (1994) Richard Noss Structure and ideology in the mathematics curriculum2 Michael de Villiers The role and function of a hierarchical classification of quadrilaterals11 Edward A. Silver On mathematical problem posing19 Paul E. Heckman , Julian Weissglass Contextualized mathematics instruction: moving beyond recent proposals29 Kazuhiko Nunokawa Improving diagrams gradually: one approach to using diagrams in problem solving34 Susan Pirie , Thomas Kieren Beyond metaphor: formalising in mathematical understanding within constructivist environments39 Anna Sfard Reification as the birth of metaphor MORE INFORMATION 44 Anna Sfard La réification comme naissance d’une métaphore (online only)55