Rice University
Rice University: Cynthia Lanius: All About Ratios
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.
PBS
Pbs: The Lowdown: Percents Combined: Proportional Relationships With Multistep Ratio and Percent Problems
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...
PBS
Pbs: Human Tree: Ratios
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...
Khan Academy
Khan Academy: Constant of Proportionality From Tables (With Equations)
Practice finding the constant of proportionality from tables with equations.
Khan Academy
Khan Academy: Constant of Proportionality From Equations
Practice finding the constant of proportionality in equations.
Khan Academy
Khan Academy: Identify Proportional Relationships From Graphs
Practice identifying proportional relationships from graphs.
Khan Academy
Khan Academy: Interpret Constants of Proportionality
Practice interpreting constants of proportionality.
Khan Academy
Khan Academy: Interpret Constant of Proportionality in Graphs
Practice interpreting the constant of proportionality in graphs.
Khan Academy
Khan Academy: Constant of Proportionality From Tables
Practice finding the Constant of proportionality from tables.
Khan Academy
Khan Academy: Constant of Proportionality From Graphs
Practice finding constant of proportionality from graphs.
Khan Academy
Khan Academy: Writing Proportional Equations From Tables
Practice writing proportional equations from tables.
Math Is Fun
Math Is Fun: Golden Ratio
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...
Math Planet
Math Planet: Proportions and Percent
Gain an understanding of percent proportions by taking a look at examples and a video lesson.
Quia
Ixl Learning: Proportions
Brush up on your math skills relating to proportions then try some practice problems to test your understanding.
Rice University
Rice University: Cynthia Lanius: Golden Ratio
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...
Alabama Learning Exchange
Alex: Thirsty for Ratios
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....
Lawrence Hall of Science
The Math Page: Trigonometry
Concepts in Trigonometry are explained and illustrated here by a member of the math department at Borough of Manhattan Community College.
Shmoop University
Shmoop: Ratios & Percentages: Ratios & Proportions
Students learn about ratios and percentages in the tutorial. The mathematics resource consists of examples and practice problems with answers.
Wyzant
Wyzant: Proportions Basics Worksheet
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.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving a Ratio With & Without a Diagram
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...
PBS
Pbs Mathline: Bead Dazzling (Proportional Reasoning) [Pdf]
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...
CK-12 Foundation
Ck 12: Interactive Middle School Math 7 for Ccss
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...
PBS
Pbs: Jazz and Math: The Beat Goes On
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.
Khan Academy
Khan Academy: Interpreting Graphs of Proportional Relationships
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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