Teaching Ratio and Proportion in the Middle Grades: "Proportional reasoning is one of the most fundamental topics in middle grades mathematics. Students’ ability to reason proportionally affects their understanding of fractions and measurement in elementary school, and it supports their understanding of functions and algebra in middle school and beyond. Given the importance of ratio and proportion, it is typical to see extensive class time devoted to the topic in upper elementary and middle school grades. This research brief addresses the research on what it means to understand ratio and proportion and how teachers can best support that understanding."
This is an interesting article!
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