Vol. 30 Num. 3 (2010) Brent Davis What the field really needs2 John Mason Mathematics education: theory, practice & memories over 50 years ABSTRACT 3 Aishikin Adam ,  Willy Alangui ,  Bill Barton Bright lights and questions: using mutual interrogation ABSTRACT 10 Marcy B. Wood Not understanding Andy: a metaphorical analysis of students’ resistance to learning ABSTRACT 17 Anderson Norton Communication: Being radical*23 Jérôme Proulx Communication: Is constructivism a victim of its success in mathematics education?24 Willy Mwakapenda Communication: Dinner with “maTHEMATICs”: in honOUR of DemYstifyING mathematics ABSTRACT 25 Melissa Rodd Geometrical visualisation – epistemic and emotional ABSTRACT 29 Denis Tanguay ,  Denise Grenier Experimentation and proof in a solid geometry teaching situation ABSTRACT 36 Christian Bokhove ,  Paul Drijvers Symbol sense behavior in digital activities ABSTRACT 43 Ann Kajander ,  Ralph Mason ,  Peter Taylor ,  Edward Doolittle ,  Tom Boland ,  Dan Jarvis ,  Wes Maciejewski Multiple visions of teachers’ understandings of mathematics ABSTRACT 50 - Contributor affiliations and contact information58