A five-question interactive challenges mathematicians to find a correct tip and total amount using percents five, 12, and 18. A tool with moveable pieces assists participants in locating answers. Types of questions include multiple-choice, fill in the blank, and one discussion. 

Concepts

money, money math, percent problems, percents, money word problems, spending money, rates, ratios, prices

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Additional Tags

math

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Instructional Ideas

• Direct pupils to answer question five on paper, then discuss their responses as a class 
• Assign the interactive during math center rotations
• Send the link for additional practice outside of school  

Classroom Considerations

• A free CK-12 account is required to access the interactive 
• The decimal points hang low like a comma
• Remind pupils to reset the model between questions 

Pros

• Boosts proficiency in an everyday-life skill 
• The model is color-coded 
• Shows correct answers, hints, and additional information when links are clicked 

Cons

• The model does not include labels for each percentage 
• Not all prices show the same amount 

Common Core

6.RP.A.3.c 7.RP.A.3