Activity
Rice University

Rice University: Cynthia Lanius: All About Ratios

For Students 1st - 5th
Make Texas chili as you learn about ratios in this interactive lesson. Students get immediate feedback on their responses and teachers have access to online assessment.
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...
Unit Plan
PBS

Pbs: Human Tree: Ratios

For Students 6th - 8th
Watch as the National Museum of Mathematics creates an interesting series of images using ratios. This video focuses on the proportional relationship observed in fractals and challenges you to do some critical thinking using ratios and...
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Khan Academy

Khan Academy: Constant of Proportionality From Tables (With Equations)

For Students 7th - 8th Standards
Practice finding the constant of proportionality from tables with equations.
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Khan Academy

Khan Academy: Constant of Proportionality From Equations

For Students 7th - 8th Standards
Practice finding the constant of proportionality in equations.
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Khan Academy

Khan Academy: Identify Proportional Relationships From Graphs

For Students 7th - 8th Standards
Practice identifying proportional relationships from graphs.
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Khan Academy

Khan Academy: Interpret Constants of Proportionality

For Students 7th - 8th Standards
Practice interpreting constants of proportionality.
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Khan Academy

Khan Academy: Interpret Constant of Proportionality in Graphs

For Students 7th - 8th Standards
Practice interpreting the constant of proportionality in graphs.
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Khan Academy

Khan Academy: Constant of Proportionality From Tables

For Students 7th - 8th Standards
Practice finding the Constant of proportionality from tables.
Unknown Type
Khan Academy

Khan Academy: Constant of Proportionality From Graphs

For Students 7th - 8th Standards
Practice finding constant of proportionality from graphs.
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Khan Academy

Khan Academy: Writing Proportional Equations From Tables

For Students 7th Standards
Practice writing proportional equations from tables.
Activity
Math Is Fun

Math Is Fun: Golden Ratio

For Students 9th - 10th
A clear explanation, with drawings and examples, of the golden ratio. The examples demonstrate the beauty of mathematics, such as how two Fibonacci numbers can approximate the golden ratio, and why the golden ratio can be called the...
eBook
Math Planet

Math Planet: Proportions and Percent

For Students 9th - 10th
Gain an understanding of percent proportions by taking a look at examples and a video lesson.
Handout
Quia

Ixl Learning: Proportions

For Students 6th - 7th Standards
Brush up on your math skills relating to proportions then try some practice problems to test your understanding.
Activity
Rice University

Rice University: Cynthia Lanius: Golden Ratio

For Students 9th - 10th
This site introduces students to the definition of golden ratio. It gives them a chance to estimate ratios and predict which figures are closest to the golden ratio. There is a link on this page that provides charts for students to...
Lesson Plan
Alabama Learning Exchange

Alex: Thirsty for Ratios

For Teachers 6th - 8th
In this lesson, the students will learn what a ratio is and how it can be used in a comparison. In this lesson, students will also determine how to combine a sports drink in powder form and water to make enough for a whole football team....
Activity
Lawrence Hall of Science

The Math Page: Trigonometry

For Students 9th - 10th Standards
Concepts in Trigonometry are explained and illustrated here by a member of the math department at Borough of Manhattan Community College.
Activity
Shmoop University

Shmoop: Ratios & Percentages: Ratios & Proportions

For Students 9th - 10th Standards
Students learn about ratios and percentages in the tutorial. The mathematics resource consists of examples and practice problems with answers.
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Wyzant

Wyzant: Proportions Basics Worksheet

For Students 9th - 10th Standards
An interactive quiz from WyzAnt of 20 proportions are presented for the students to solve and then check their answers. All can be computed with simple cross-multiplying.
Activity
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Solving a Ratio With & Without a Diagram

For Students 9th - 10th Standards
A student is searching for a solution to a ratio question without using a diagram. Dr. Math helps to break it down both with and without a diagram. An understanding of fractions, multiplication, and basic algebra is necessary to get this...
Lesson Plan
PBS

Pbs Mathline: Bead Dazzling (Proportional Reasoning) [Pdf]

For Teachers 3rd - 8th
A comprehensive instructional activity on algebraic thinking where students create and identify patterns using proportional reasoning. Research based, this instructional activity includes technology connections, items for discussion, and...
eBook
CK-12 Foundation

Ck 12: Interactive Middle School Math 7 for Ccss

For Students 7th
A complete CCSS Grade 7 Mathematics course that includes interactives in every lesson, plus videos, hands-on activities, and questions with immediate feedback. Every lesson also has specifically chosen 'Related Modalities' that teach the...
Lesson Plan
PBS

Pbs: Jazz and Math: The Beat Goes On

For Teachers 9th - 10th
This lesson will require students to collect data through listening, counting and timing. They will use ratios, rates, and proportions to report data. They will also demonstrate an understanding of the concepts of rhythm and tempo in music.
Unit Plan
Khan Academy

Khan Academy: Interpreting Graphs of Proportional Relationships

For Students 6th - 8th Standards
Practice reading and analyzing graphs of proportional relationships. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

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