Vol. 32 Num. 3 (2012) Chrystalla Papademetri-Kachrimani Revisiting van Hiele ABSTRACT 2 Paul Ernest What is our first philosophy in mathematics education? ABSTRACT 8 Wolff-Michael Roth Mathematical learning, the unseen and the unforseen ABSTRACT 15 Beatriz D'Ambrosio , Signe Kastberg Giving reason to prospective mathematics teachers ABSTRACT 22 Andrea McCloskey Caring in professional development projects for mathematics teachers: an example of stimulation and harmonizing ABSTRACT 28 Amir Asghari Specularity in algebra ABSTRACT 34 Paul Christian Dawkins Extensions of the semantic/syntactic reasoning framework ABSTRACT 39 - Contributor affiliations and contact information48