Vol. 25 Num. 2 (2005) Marja Van Den Heuvel-Panhuizen The role of contexts in assessment problems in mathematics2 Signe E. Kastberg , Beatriz D'Ambrosio , George McDermott , Nivan Saada Context matters in assessing students' mathematical power10 Francine Roy , Celia Rousseau Student thinking as a context for high expectations16 David A. Reid , Matthew Inglis Talking about logic24 Bruno D'Amore Secondary school students' mathematical argumentation and Indian logic (nyaya)26 David A. Reid Communication: Juxtapositions33 Tim Fukawa-Connelly Communication: Thoughts on learning advanced mathematics33 Morten Misfeldt Media in mathematical writing: can teaching learn from research practice?36 Abraham Arcavi Developing and using symbol sense in mathematics42