eBook
Math Planet

Math Planet: Algebra 1: Calculating With Percents

For Students 9th - 10th
Provides examples and a video lesson that illustrates how to solve percent problems.
Unit Plan
PBS

Pbs: The Lowdown: Percents Combined: Proportional Relationships With Multistep Ratio and Percent Problems

For Students 6th - 8th
Learn how to calculate sale price when combining two "percent-off" discounts in this video from KQED. In the accompanying classroom activity, students develop and share a variety of strategies, including modeling with a 10 x 10 grid to...
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McGraw Hill

Glencoe Mathematics: Online Study Tools: Ratio, Proportion, and Percent

For Students 9th - 10th Standards
Students show comprehension of basic arithmetic skills. The online test assesses scholars on ratios, proportions, and percents.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 7.rp Comparing Years

For Teachers 7th
In this lesson, 7th graders determine the proportional relationships to determine the percent decrease.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 7.rp Chess Club

For Teachers 7th
Seventh graders use their knowledge of proportional relationships to determine the percent increase or decrease.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 7.rp Finding a 10% Increase

For Teachers 7th
Seventh graders use proportional reasoning to sovle a percent problem in this activity.
Website
PBS

Pbs Learning Media: Atmospheric Oxygen

For Students 3rd - 5th
In this feature, adapted from Interactive NOVA: Earth, students explore the relationship between oxygen concentration and the well-being of various organisms by simulating a change in oxygen levels and observing what happens.

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