Assessment of secondary students’ number strategies: The development of a written numeracy assessment tool.

identify students‘ ―global‖ strategy stages and provide formative data for teachers. The Year 9 cohorts from two schools were assessed at the end of the school year. Numeracy experts then interviewed a sample, to identify each student‘s strategy stage, using an oral assessment. Results from the written assessment gave relatively consistent measures of stages in terms of the criteria set and a relatively close match to national data. Comparison of the written and oral assessment results showed the stages identified by the two measures to be generally consistent.