SOLVING MULTIDIGIT MATHEMATICS PROBLEMS
2The effects of presenting multidigit mathematics problems in a realistic context on sixth graders' problem solving Mathematics education and assessments increasingly involve arithmetic problems presented in context: a realistic situation that requires mathematical modeling. The present study's aim was to assess the effects of such typical school mathematics contexts on two aspects of problem solving, performance and strategy use, with a special focus on the role of students' language level. 685 sixth graders from the Netherlands solved a set of multidigit arithmetic problems on addition, subtraction, multiplication, and division. These problems were presented in two conditions: with and without a realistic context. Regarding performance, item response theory (IRT) models showed first that the same (latent) ability dimension was involved in solving both types of problems. Second, the presence of a context increased the difficulty level of the division problems, but not of the other operations. Regarding strategy use, results showed that strategy choice and strategy accuracy were not affected by the presence of a problem context. More importantly, the absence of context effects on performance and on strategy use held for different subgroups of students, with respect to gender, home language, and language achievement scores. In sum, the present findings suggest that at the end of primary school the presence of a typical context in a multidigit mathematics problem had no marked effects on students' multidigit arithmetic problem solving behavior.Keywords: word problems, mathematics education, solution strategy, multidimensional IRT, linear logistic test model (LLTM).
SOLVING MULTIDIGIT MATHEMATICS PROBLEMS
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IntroductionMathematics education has experienced a large international reform (e.g., Kilpatrick, Swafford, & Findell, 2001). A general characteristic of this reform is that instruction no longer focuses predominantly on decontextualized traditional mathematics skills, but that instead the process of solving realistic mathematics problems and doing mathematics are important educational goals (e.g., NationalCouncil of Teachers of Mathematics, 1989Mathematics, , 2000. Word problems or the broader category of contextual problems 1 -typically a mathematics structure in a realistic In the Netherlands, the reform is characterized by the principles of Realistic Mathematics Education (RME; Freudenthal, 1973Freudenthal, , 1991 Treffers, 1993). In RME, contextual problems (defined as a problem that is experientially real to students) are central: they are the starting point for instruction, which is based on the principle of progressive schematization or mathematization by guided reinvention (Gravemeijer & Doorman, 1999). That is, contextual problems are expected to elicit informal or naive solution strategies which are progressively abbreviated and schematized, in a process guided by the teacher. In the last decades, RME has become the dominant instructional approach in mathemati...