# ALEX Lesson Plan

## How Big Should it Be?

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This lesson provided by:
 Author: Tim McKenzie Organization: UAB/UABTeach The event this resource created for: CCRS General Lesson Information
 Lesson Plan ID: 33091 Title: How Big Should it Be? Overview/Annotation: This lesson will allow students to become familiar with the concept of equivalent ratios and similar objects. Through an open investigation, students will develop methods to find equivalent ratios. This is a lesson to be used as part of a unit with Painter Problems and How Far Can You Leap found in ALEX.This is a College- and Career-Ready Standards showcase lesson plan.
Associated Standards and Objectives
Content Standard(s):
 Mathematics MA2019 (2019) Grade: 6 1. Use appropriate notations [a/b, a to b, a:b] to represent a proportional relationship between quantities and use ratio language to describe the relationship between quantities. Alabama Alternate Achievement Standards AAS Standard: M.AAS.6.1 Demonstrate a simple ratio relationship using ratio notation given a real-world problem. Mathematics MA2019 (2019) Grade: 6 3. Use ratio and rate reasoning to solve mathematical and real-world problems (including but not limited to percent, measurement conversion, and equivalent ratios) using a variety of models, including tables of equivalent ratios, tape diagrams, double number lines, and equations. Alabama Alternate Achievement Standards AAS Standard: M.AAS.6.1 Demonstrate a simple ratio relationship using ratio notation given a real-world problem. Mathematics MA2019 (2019) Grade: 7 2. Represent a relationship between two quantities and determine whether the two quantities are related proportionally. a. Use equivalent ratios displayed in a table or in a graph of the relationship in the coordinate plane to determine whether a relationship between two quantities is proportional. b. Identify the constant of proportionality (unit rate) and express the proportional relationship using multiple representations including tables, graphs, equations, diagrams, and verbal descriptions. c. Explain in context the meaning of a point (x,y) on the graph of a proportional relationship, with special attention to the points (0,0) and (1, r) where r is the unit rate. Alabama Alternate Achievement Standards AAS Standard: M.AAS.7.2 Use a ratio to model or describe a real-world relationship. Mathematics MA2019 (2019) Grade: 7 17. Solve problems involving scale drawings of geometric figures, including computation of actual lengths and areas from a scale drawing and reproduction of a scale drawing at a different scale.

Local/National Standards:

Math Practice Standards:

• Make sense of problems and persevere in solving them.
• Reason abstractly and quantitatively.
• Construct viable arguments and critique the reasoning of others.
• Model with mathematics.
• Use appropriate tools strategically.
• Attend to precision.
• Look for and make use of structure.
• Look for and express regularity in repeated reasoning.

Primary Learning Objective(s):

I CAN identify and develop ratios in real world situations.

I CAN identify equivalent ratios.

I CAN compare ratios in real world situations.