Purple Math
Purplemath: The Unit Circle
Relates the unit circle to the method for finding trig ratios in any of the four quadrants. Demonstrates how the unit circle might be useful.
Other
Nearpod: Percents: Finding the Part
In this lesson, students will learn how to find the missing part when given the percent and the whole.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: What Is a Ratio?
The question posed to Dr. Math is, "What is a ratio and how do you do it?" Dr. Math breaks it down in this detailed explanation using real world scenarios.
National Council of Teachers of Mathematics
The Math Forum: Calculating Sales Tax
Dr. Math is asked about calculating sales tax. A quick and easy to follow explanation of how it works using fractions, decimals, ratio, and percent.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Learning Ratios & Proportions Through Scale Drawings
Website which strengthens the conceptual connection between scale drawings and ratios through an activity lesson plan.
The Math League
The Math League: Ratio and Proportion
Detailed explanations of ratio, comparing ratios, proportion, rate, converting rates, and average rate of speed, all with examples.
The Math League
The Math League: Ratio
This site gives a definition of a ratio along with two word problems. Also shows the student how to compare ratios using fractions.
AAA Math
Aaa Math: How to Determine a Ratio
This site explains the meaning of ratio and how to determine a ratio. Gives practice and games to practice this skill.
Other
All Elementary Mathematics: Proportionality and Ratio
A brief explanation of the mathematical relationship between ratio, proportion, and proportionality. Examples are included.
Other
Mathpower: Math Fundamental Assignments
Math variety of concepts, this colorful website is sure to give your students the chance show what they know. Concepts covered include rounding, division with decimals, order of operations, ratio, percent, multiplication, and division of...
Other
The Prime Glossary: Rational Numbers
This site gives a definition of what a rational number is. Gives examples and formulas. Very helpful.
Sophia Learning
Sophia: Equivalent Ratios: Lesson 5
This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 5 of 8 in the series titled "Equivalent Ratios."
Sophia Learning
Sophia: Equivalent Ratios: Lesson 8
This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 8 of 8 in the series titled "Equivalent Ratios."
Sophia Learning
Sophia: Measurement Comparisons: Lesson 3
This lesson explains how to compare measurements using ratios. It is 3 of 5 in the series titled "Measurement Comparisons."
Sophia Learning
Sophia: What Are Ratios?
This lesson defines the term ratio. Students can look at a two-page presentation of notes and practice problems.
Sophia Learning
Sophia: Simplifying Measurement Ratios: Lesson 3
This lesson demonstrates how to simplify ratios containing measurements. It is 3 of 4 in the series titled "Simplifying Measurement Ratios."
Sophia Learning
Sophia: Simplifying Ratios: Lesson 3
This lesson demonstrates how to simplify ratios. It is 3 of 5 in the series titled "Simplifying Ratios."
Sophia Learning
Sophia: Simplifying Ratios: Lesson 1
This lesson demonstrates how to simplify ratios. It is 1 of 5 in the series titled "Simplifying Ratios."
Sophia Learning
Sophia: Writing Ratios #2
This lesson demonstrates how to write ratios using both number and variable notation.
Sophia Learning
Sophia: Writing Ratios
This lesson demonstrates how to write ratios using both number and variable notation.
Sophia Learning
Sophia: Simplifying Measurement Ratios: Lesson 4
This lesson demonstrates how to simplify ratios containing measurements. It is 4 of 4 in the series titled "Simplifying Measurement Ratios."
ClassFlow
Class Flow: Perimeter of Regular Figures
[Free Registration/Login Required] This elementary flipchart presents the concept of regular shapes and ways of measuring perimeter. It also explores the ratio of perimeter to side length that equals the number of sides.
ClassFlow
Class Flow: Probability
[Free Registration/Login Required] This flipchart gives students the opportunity for hands on exploration of probabilities using the dice tool and other real life probability cases. The lesson concludes with a 5 question Activote session.