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Lesson Plan
Indiana University

Indiana University: Area 10 Mathematics and Technology: Graphing Ratios

For Teachers 9th - 10th Standards
Activities to explore writing ratios, graphing ratios and using ratios to solve problems. Both a teacher and student guide are included.
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Lesson Plan
Better Lesson

Better Lesson: Understanding Tape Diagrams

For Teachers 6th Standards
Using a tape diagram is one of the key models for ratios and proportions.