Lessons in Units

CCSS Units
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New Twenty

How does life expectancy affect how you live your life? Students use proportions to determine what life expectancy must have been in the past in order for the phrase "30 is the new 20" to be accurate, and explore how life might change as life expectancy changes.

Topic: Ratios and Proportional Relationships (RP)

Leonardo Numbers

Are there numbers hidden in nature? Students use the Fibonacci Sequence and Golden Ratio to uncover the mathematical mysteries of the universe.

Topic: Ratios and Proportional Relationships (RP), Statistics and Probability (SP)
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Jen Ratio

How does the media affect our happiness? Students explore the concept of the jen ratio – the ratio of positive to negative observations in our daily lives – and use it to discuss how the media influences our experience of the world.

Topic: Ratios and Proportional Relationships (RP)
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I Remember

How much can you trust your memory? Students construct and compare linear and exponential models to explore how much a memory degrades each time it's remembered.

Topic: Interpreting Functions (IF), Linear, Quadratic, and Exponential Models (LE)
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What's a healthy weight? Students evaluate the Body Mass Index (BMI) formula for several celebrities, and discuss whether BMI is always a good measure of health.

Topic: Expressions and Equations (EE)
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Frame Rate

How do filmmakers create slow-motion and time-lapse videos? Students combine a camera's frame rate, a video player's frame rate, and proportional reasoning to explore movie magic.

Topic: Ratios and Proportional Relationships (RP)
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Carpe Donut

How much should people pay for donuts? Students use linear, rational, and piecewise functions to describe the total and average costs of an order at Carpe Donut.

Topic: Building Functions (BF), Interpreting Functions (IF)
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Do social networks like Facebook make us more connected? Students create a quadratic function to model the number of possible connections as a network grows, and consider the consequences of relying on Facebook for news and information.

Topic: Building Functions (BF), Creating Equations (CED), Interpreting Functions (IF)
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Civic Duty

Is it worth paying extra for a hybrid car? Students use proportional reasoning to determine how much hybrid owners save on gas, and how long it will take to make up the price difference.

Topic: Expressions and Equations (EE), Ratios and Proportional Relationships (RP)

Cheese That Goes Crunch

Which is better: crunchy or puffy Cheetos? Students calculate the surface area : volume ratio for each snack to determine which one tastes cheesier.

Topic: Geometric Measurement and Dimension (GMD), Geometry (G), Modeling with Geometry (MG)

Calories In, Calories Out

How many calories does a body burn? Students interpret and apply the formula for resting metabolic rate (RMR) in order to learn about how calories consumed from food, calories burned from exercise, and calories burned automatically contribute to a body's weight.

Topic: Expressions and Equations (EE), Ratios and Proportional Relationships (RP)

Basketball IQ

In basketball, which shot should you take? Students use probability and expected value to determine how much 3-point and 2-point shots are really "worth" to different NBA players.

Topic: Conditional Probability and the Rules of Probability (CP)

Are We Alone?

What are the chances that we'll communicate with aliens? Students use fraction multiplication to explore the Drake Equation, the formula astronomers use to estimate the number of intelligent civilizations with whom we might communicate.

Topic: Number and Operations -- Fractions (NF)