Title  Description  Thumbnail Image 

Why Are Castles So Tall? 
DescriptionIn this module students explore indirect measurement by seeing how simple angle measure, height measurements, and tangent ratios can be used to calculate distances. The context of castles provides a historically relevant military purpose for the tallness of castles. 

Algebra Application: Linear Functions: Circumference vs. Diameter 
In this Algebra Application, students study the direction between diameter and circumference of a circle. Through measurement and data gathering students analyze the line of best fit and explore ways of calculating pi. The math topics covered include: Mathematical modeling 

Algebra Application: Why Are Receipts So Long? 
In this Algebra Application, students gather data to study the lengths of paper receipts. They also learn to estimate the total number of receipts produced worldwide using industry data. From this they can study the environmental impact of having to produce so many paper receipts. The math topics covered include: 

Algebra Application: Why Are Wildfires So Dangerous? 
In this Algebra Application, students learn about wildfires and the measurement of air quality. The math topics covered include: Scientific notation 

Closed Captioned Video: Percents: Applications of Percent  Grade 
DescriptionVideo Tutorial: Applications of Percent  Grade. In this video we investigate the concept of the grade of a road. This is an application of percents, where the slope of a road or a ski slope is written in percent form. We interpret this percent measurement as a slope measurement. 

Closed Captioned Video: Percents: Calculating Commissions and Tips 
DescriptionVideo Tutorial: Percents: Calculating Commissions and Tips. In this video we look at using percent formulas to calculate sales commissions and tips. Various realworld scenarios are investigated for calculating these percentbased amounts. 

Closed Captioned Video: Percents: Calculating Tax 
DescriptionVideo Tutorial: Percents: Calculating Tax. In this video we look at using tax rates to calculate tax owed. The tax rates are written as percents and converted to decimals to calculate the tax. 

Closed Captioned Video: Percents: Multiple Percents 
DescriptionVideo Tutorial: Percents: Multiple Percents. In this video, we investigate calculating the percent of a percent. Multiple calculations of a percent are investigated relative to a combined percent calculation. 

Closed Captioned Video: Percents: Percent Decrease 
DescriptionVideo Tutorial: Percents: Percent Decrease. In this video, we look at the concept of percent decrease. The formula for calculating percent decrease is shown and used in the context of solving realworld problems. 

Closed Captioned Video: Percents: Percent Increase 
DescriptionVideo Tutorial: Percents: Percent Increase. In this video, we look at the concept of percent increase. The formula for calculating percent increase is shown and used in the context of solving realworld problems. 

Closed Captioned Video: Percents: Percents and Multiples of Numbers 
DescriptionVideo Tutorial: Percents: Percents and Multiples of Numbers. In this video, we explore the difference between percent growth and the multiple of a number. Several realworld examples are used to explore these differences. 

Closed Captioned Video: Percents: Probabilities and Percents 
DescriptionVideo Tutorial: Percents: Probabilities and Percents. In this video, percent calculations are used to explore probabilities of events. From a percentbased probability predictions are made for given outcomes. 

Closed Captioned Video: Percents: Simple Interest 
DescriptionVideo Tutorial: Percents: Simple Interest. In this video, we look at simple interest in the context of using percent to make calculations. A formula for calculating simple interest is shown and used to solve several realworld problems. 

Closed Captioned Video: Ratios: Application of Ratios: Roofs and Ramps 
DescriptionIn this video, we explore the application of ratio concepts to the pitch of a roof and the slope of a ramp. Several realworld examples are explored. 

DefinitionRatios, Proportions, and Percents ConceptsCalculating Tax 
DefinitionRatios, Proportions, and Percents ConceptsCalculating TaxThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsCalculating Tips 
DefinitionRatios, Proportions, and Percents ConceptsCalculating TipsThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsConverting Units 
DefinitionRatios, Proportions, and Percents ConceptsConverting UnitsThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsDimensional Analysis 
DefinitionRatios, Proportions, and Percents ConceptsDimensional AnalysisThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsEquivalent Ratios 
DefinitionRatios, Proportions, and Percents ConceptsEquivalent RatiosThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsParttoPart Ratios 
DefinitionRatios, Proportions, and Percents ConceptsParttoPart RatiosThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsParttoWhole Ratios 
DefinitionRatios, Proportions, and Percents ConceptsParttoWhole RatiosThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsPercent 
DefinitionRatios, Proportions, and Percents ConceptsPercentThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsPercent Decrease 
DefinitionRatios, Proportions, and Percents ConceptsPercent DecreaseThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsPercent Increase 
DefinitionRatios, Proportions, and Percents ConceptsPercent IncreaseThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 

DefinitionRatios, Proportions, and Percents ConceptsPercent of a Number 
DefinitionRatios, Proportions, and Percents ConceptsPercent of a NumberThis is part of a collection of definitions related to ratios, proportions, and percents. This includes general definitions for ratios, proportions, percents, as well as terms related to similarity, proportionality, and equivalence of ratios. 