EFFECT OF THE NUMBER STRUCTURE AND NATURE OF QUANTITIES ON THE SECONDARY SCHOOL STUDENTS' PROPORTIONAL REASONING
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This study investigates the effect of the number structure (integer vs. non-integer ratios) and the nature of the quantities (discrete vs. continuous) on the performance of the secondary school students and on the strategies they use when solving proportional and non-proportional word problems. 551 secondary school students from 1st to 4th grade solved a test with proportional and non-proportional problems in which the task variables mentioned before were manipulated. Results showed that number structure affected students' performance and the strategies were used differently for proportional and non-proportional problems along the grades. However, the nature of the quantities showed no influence.
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