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About Variation

Proportional reasoning (Math 7) 
Flash 
Tool 

[0]

This tutorial explains direct variation, indirect variation, and the constant of variation as they describe the relationship between the x and y values in a simple function.
College Cram charges...
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All About Ratios

Proportional reasoning (Math 7) 
Computer 
Tool 

[2]

The "All About Ratios" activities are designed to introduce ratios in a conceptbuilding way. The activities can be done on computers with Internet access or be printed. The author suggests that pairs...
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All About Ratios: A Learning T...

Proportional reasoning (Math 7) 
Flash 
Tool 

[2]

The "All About Ratios" activities are designed to introduce ratios in a conceptbuilding way. Activities include both practice exercises and a quiz.
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Ameba

Proportional reasoning (Math 7) 
Flash 
Tool 

[3]

Ameba is designed to help students gain a better understanding of ratios and proportions. Students are asked to eat a given amount of dots in reference to the total number of dots on the board. The to...
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Compare Prices During the Grea...

Proportional reasoning (Math 7) 
JavaScript 
Support Material 

[0]

How much did toys and clothing cost during the Great Depression of the 1930s? What would they cost today?
Look at the Then and Now: Prices table below. In the left column is a list of women's clot...
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Consumer Price Index (Estimate...

Proportional reasoning (Math 7) 
JavaScript 
Support Material 

[0]

This page has data on the Consumer Price Index (CPI) is a measure of the average change in prices over time in a market basket of goods and services. The Bureau of Labor Statistics releases CPI data m...
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Consumer Price Index, 1913

Proportional reasoning (Math 7) 
JavaScript 
Support Material 

[0]

The Consumer Price Index (CPI) is a measure of the average change in prices over time in a market basket of goods and services. The Bureau of Labor Statistics releases CPI data monthly. This table pro...
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Direct Variation (Amsco Integr...

Proportional reasoning (Math 7) 
Flash 
Support Material 

[0]

This minilesson explains direct variation: a relationship between two variables such that their ratio is always constant.
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How much did it cost back in?

Proportional reasoning (Math 7) 
Computer 
Tool 

[0]

This WolframAlpha widget calculates and displays the current value of a historical amount of money.
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Personal Shopper

Proportional reasoning (Math 7) 
Flash 
Tool 

[3]

The Personal Shopper game uses shopping and moneyhandling in order to reinforce the idea of proportional reasoning. The gameplay involves the player being given a certain amount of money, and a perc...
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Tip Jar

Proportional reasoning (Math 7) 
Computer 
Tool 

[0]

What's the deal with all the tip calculators in the App Store? Is calculating 15% hard? Nope, and this lesson uses percents to explore the math of eatingand workingin a restaurant, from leaving ti...
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