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## Construction Site Math: Ratios

In this real-world application of ratios, students will learn what a ratio is, including ratios with three terms. They will see different ways of writing ratios, including fractions in simplest form.

a:b     $\frac{a}{b}$     a to b

Two short videos introduce the concept of ratios and each video includes real-world examples of ratios. Then several formative assessments are used to test for understanding.

Students then look at the application of ratios to the mixing of concrete at a construction site, starting with a video then followed by an assessment.

This lesson can be assigned to individual students or teams of students. The lesson can be completed in about 20 minutes.

#### Math Concepts

• Ratios and Rates
• Algebra

#### Learning Objectives

• Identifying ratios
• Simplifying ratios
• Working with ratios with three items

#### Prerequisite Skills

• Writing fractions
• Simplifying fractions
Common Core Standards CCSS.MATH.CONTENT.6.RP.A.1, CCSS.MATH.CONTENT.7.RP.A.2 20 mins 6th - 7th Grade