| Second Look - Ratio and Proportion |
Miniature Toys Introduce Ratio and Proportion with a Real-World Connection
Miniature plastic toys are ideal models for introducing ratios and proportions. They concretely emphasize the real-world connection of the concepts to objects. Activity included. |
Problems that Encourage Proportion Sense
Several problems promoting proportion sense, reasoning about quantities, and the various relationships among quantities in proportions. |
Using School Lunches to Study Proportion
A project in which proportion, ratio, and percent are used to analyze the nutritional value of student lunches. Sample student work included. |
Illuminations Lesson: Understanding Rational Numbers and Proportions
In this lesson, students use real-world models to develop an understanding of fractions, decimals, unit rates, proportions, and problem solving. The three activities in this investigation center on situations involving rational numbers and proportions that students encounter at a bakery. These activities involve several important concepts of rational numbers and proportions, including partitioning a unit into equal parts, the quotient interpretation of fractions, the area model of fractions, determining fractional parts of a unit not cut into equal-sized pieces, equivalence, unit prices, and multiplication of fractions. |
Number and Operations Standard for Grades 6-8
Instructional programs from prekindergarten through grade 12 should enable all students to—
- Understand numbers, ways of representing numbers, relationships among numbers, and number systems
- Understand meanings of operations and how they relate to one another
- Compute fluently and make reasonable estimates
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