Vol. 22 Num. 1 (2002) Marcia Pinto , David Tall Building formal mathematics on visual imagery: a case study and a theory2 Gelsa Knijnik Ethnomathematics: culture and politics of knowledge in mathematics education11 Darren Stanley Communication: A response to Nunokawa's article 'Surprises in mathematics lessons'15 Luisa Andrade , Patricia Perry Communication: Revista EMA: an unexpected challenge17 Junichi Hasewaga Case studies on the symbolism of difference-finding problems in first grade21 Renuka Vithal A pedagogy of conflict and dialogue for mathematics education from a critical perspective29 Jo Boaler The development of disciplinary relationships: knowledge, practice and identity in mathematics classrooms42