Vol. 28 Num. 1 (2008) Paul Ernest Towards a semiotics of mathematical text (part 1)2 Gabriel J. Stylianides An analytic framework of reasoning-and-proving(part 1)9 F.D. Rivera On the pitfalls of abduction: complicities and complexities in patterning activity17 Barbara Jaworski , Stephen Lerman Leone Minna Burton: 14.9.1936-1.12.200726 Jérôme Proulx Communication: Courte réflexion sur l'intérêt des mathématiques en didactique des mathématiques28 Nathalie Sinclair Attending to the aesthetic in the mathematics classroom29 Alexander Karp Which problems do teachers consider beautiful? A comparative study36 George Gadanidis , Marcelo C. Borba Our lives as performance mathematicians44