“…In the context of numerical problem solving, mathematical modeling entails choosing an arithmetic operation that corresponds to the situation described in the problem text. College students have extensive experience with this modeling task, and are highly fluent in selecting arithmetic operations that are structurally analogous to the quantitative relations in word problems (e.g., Bassok, Chase, & Martin, 1998;Bassok, Wu, and Olseth, 1995;Dixon, 2005;Dixon, Deets & Bangert, 2001;Martin & Bassok, 2005). When students transition to algebra and learn that algebraic models have a standard (multiplication) form, some of them may be unsure whether and, if so, how algebraic modeling involves selecting an appropriate arithmetic operation.…”