Lesson objective: Apply knowledge of unit rate to determine which sibling grew faster.

This lesson provides an opportunity for students to apply their knowledge and understanding of unit rate to a real-world situation. Students are asked to determine which sibling grew faster given data about height measurements and the year those measurements were taken.

Key Concept students will use:

Skills students will use:

- calculating a unit rate given a ratio
- comparing unit rates

Students engage in Mathematical Practice 4 (Model with mathematics) as they identify the important quantities on the height chart and map their relationships so they can draw conclusions about which child grew fastest.

**Key vocabulary: **

- ratio
- ratio table
- unit rate