Lesson objective: Represent a situation using a ratio, in multiple different ways.
This lesson has been revised from its original format to include modifications for teaching English learners (ELs). The original lesson is located at: https://learnzillion.com/lesson_plans/2553-2-identify-and-describe-ratio-relationships-fp.
This lesson helps to build fluency with writing ratio statements. The distinction between part-to-part and part-to-whole relationships is used here because it supports students' development of the multiple ways to represent the same situation. This work develops students' understanding that a ratio is a comparison by division.
Students engage in Mathematical Practice 4 (model with mathematics) as they apply ratio reasoning to a real life situation.
Key vocabulary:
- ratio
- colon
- part
- whole
- part to part ratio
- part to whole ratio