Vol. 19 Num. 1 (1999) David Pimm Editorial2 Patricio Herbst , Jeremy Kilpatrick Pour lire Brousseau3 Judit Moschkovich Supporting the participation of English language learners in mathematical discussions11 Iben Christiansen Are theories in mathematics education of any use to practice?20 William Higginson Sounds of canons at our gates: post-modernism comes to mathematics education24 Jeremy Gray Mathematicians as philosophers of mathematics: part 228 Bill Barton Ethnomathematics: a political plaything32 André Toom Communication: Word problems: applications or mental manipulatives36 Janet Ainley Who are you today? Complementary and conflicting roles in school-based research39