This document contains both volumes of the proceedings of a conference of the Mathematics Education Research Group of Australasia (MERGA). Three keynote papers by Gordon Knight, J. Michael Shaughnessy, and Robyn Zevenbergen, and a practical implications paper by Lyn English are included. Seventy-five conference papers are included in these proceedings that focus on people in mathematics education, interactions among them, and the instructional materials employed. In the Short Communication Papers section there are 28 brief papers and poster sessions pertaining to the same broad topic. Topics treated in this section include graphics calculators, numeracy, use of imagery, professional development, and teaching stochastics. (DDR)