Abstract
This paper reports changes in the extent to which a group of Year 11 students used CAS, pen-and-paper (P&P), or a combination of both, when solving routine problems across seven months in four different topics. Comparing the frequency of CAS use across topics shows students made greater use of CAS than P&P in the topics of Linear, quadratic, and cubic functions and Exponential and logarithmic functions than in the topics of Trigonometry and circular functions and Calculus. These differences suggest that students either made different choices about the use of CAS in different topics or used CAS less frequently as they developed experience with CAS