Freeport - McMoRan: Dig Into Mining - Economic Feasibility Study
Freeport - McMoRan

In this activity, students will analyze proportional relationships and use them to solve real-world problems.

Mathalicious: Text Me Later

Students use proportional reasoning to determine how far a car travels in the time it takes to text.

Mathalicious: Letterboxing

In this lesson students learn about aspect ratios in TV and film, and how the process of “letterboxing” affects the final image.

Mathalicious: New Twenty

In this lesson, students use proportions to determine what life expectancy must have been in order for 30 to really be the new 20.

Mathalicious: Coupon Clipping

In this lesson, students reason with percents and proportions to evaluate enticing coupons and debate whether retailers should be allowed to raise the price of items in order to then put them on sale.

Real World Math: Concept Lessons - Estimation
Real World Math

Two sample problems are included that demonstrate how Google Earth can present estimation problems involving area. 

Real World Math: Measurement - Complex Area
Real World Math

This lesson consists of two parts. 

Real World Math: Measurement - Crop Circles
Real World Math

Anyone who has seen these strange circles from an airplane can see how easily they can be incorporated into a Google Earth math lesson.

Illuminations: Understanding Rational Numbers and Proportions
Illuminations (National Council of Teachers of Mathematics)

his lesson, students use real-world models to develop an understanding of fractions, decimals, unit rates, proportions, and problem solving.

Illuminations: What's Your Rate?
Illuminations (National Council of Teachers of Mathematics)

Students learn to write and solve proportions by gathering data and calculating unit rates.

Illuminations: In Your Shadow
Illuminations (National Council of Teachers of Mathematics)

Students extend their knowledge of proportions to solving problems dealing with similarity.