“…The idea of using a CRS to gather evidence of students' thinking, and using this as a starting point for generating productive classroom discussions, harmonizes with principles of formative assessment. In fact, literature reviews (Caldwell, 2007;Egelandsdal et al, 2019;Kay & LeSage, 2009) and other case studies in mathematics education (Kay et al, 2010;King & Robinson, 2009;Krumsvik & Ludvigsen, 2012) point out that one of the most important benefits of using a CRS is the possibility to improve formative assessment practices, and especially provide feedback to students. As such, the use of a CRS creates opportunities for instant formative feedback in direct relation to the students' work with mathematical tasks.…”