Teach your classes how to solve a simple proportion. A video tutorial explains the process of cross multiplying to solve a basic proportion. The instructor reinforces the meaning of a proportion by solving an example by inspection.

Concepts

ratios, proportions, solving equations, proportional reasoning

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Additional Tags

math

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Instructional Ideas

• Review equivalent fractions prior to the lesson

Classroom Considerations

• Learners should be fluent with simplifying fractions and solving simple equations
• Ensure individuals have access to the Internet if assigning the video as homework

• This video is hosted on YouTube

Pros

• Explains the relationship between ratios and proportion before solving

Cons

• Uses the cross multiplying shortcut without explaining why it works

Common Core

7.RP.A.3