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#### Chapter 5-1: Shadows Device Lesson Plan Template

Format: small group

What concept or idea is being developed in this lesson? Which case are you addressing?

Case 1 Height Shadow Constant-Distance to light/height of prop = constant

What mathematical practice or standards are being addressed?

• 1. Make sense of problems and persevere in solving them.
• 2. Reason abstractly and quantitatively.

• 1. Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities.
• 3. Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations.
• 3a. Make tables of equivalent ratios relating quantities with whole number measurements, find missing values in the tables, and plot the pairs of values on the coordinate plane. Use tables to compare ratios.

Time: 2 hrs

Essential question: How do you solve problems using ratio concepts and use ratio reasoning?

Objective: Students will be able to understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities.

Vocabulary: ratio, equivalent ratio, constant

Materials: Shadow generator, props, Promethean board with flipchart, graph paper, table, yardstick, lesson quiz