“…New Zealand, along with other western countries responded to its relatively poor results on the Third International Mathematics and Science Study (TIMSS) by developing an initiative designed to strengthen students' understanding of mathematics and numeracy. Most initiatives in mathematics focused initially on the early years of school (Bobis et al, 2005;British Columbia Ministry of Education, 2003;Commonwealth of Australia, 2000;Department for Education and Employment, 1999;Ministry of Education, 2001; National Council of Teachers of Mathematics, 2000). These initiatives have several features in common, including professional development programmes for teachers to enhance their capacity to teach mathematics, the construction of developmental frameworks that describe progressions in the learning of mathematics, individual taskbased interviews to assess students' thinking and reasoning in mathematics, and a constructivist/ socioconstructivist view of mathematics teaching and learning, so that instruction builds on the existing knowledge of the learner (Bobis et al, 2005).…”