Vol. 28 Num. 2 (2008) Abraham Arcavi Modelling with graphical representations ABSTRACT 2 Jeongho Woo ,  Jaehoon Yim Revisiting 0.999... and (-8)^1/3 in school mathematics from the perspective of the algebraic permanence principle ABSTRACT 11 Jérôme Proulx ,  David Pimm Algebraic formulas, geometric awareness and Cavalieri's principle ABSTRACT 17 Richard Barwell ,  Luis Radford ,  Brent Davis Communication: Meta-communication25 Susan Staats Poetic lines in mathematics discourse: a method from linguistic anthropology26 Steven Khan Mathematics and the steel drum ABSTRACT 33 Paul Ernest Towards a semiotic of mathematical text (part 2) ABSTRACT 39