Activity
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Cake Recipe Ratio

For Students 9th - 10th Standards
Dr. Math has to go into the kitchen to solve this real-world problem. A student is looking for a solution to a ratio problem about baking a cake. You'll need to stir up your knowledge of ratios, fractions, decimals, proportions, and...
Interactive
Calculator Soup

Calculator Soup: Fractions Solve for Unknown X

For Students 9th - 10th
Solve for an unknown value x with this fractions calculator. Find the missing fraction variable in the proportion using cross multiplication to calculate the unknown variable x. Solve the proportion between 2 fractions and calculate the...
PPT
Sophia Learning

Sophia: Using Equations to Describe Proportions: Lesson 3

For Students 7th - 8th Standards
This lesson explains how proportional relationships can be described using equations. It is 3 of 5 in the series titled "Using Equations to Describe Proportions."
Unit Plan
Sophia Learning

Sophia: Using Equations to Describe Proportions: Lesson 4

For Students 7th - 8th Standards
This lesson explains how proportional relationships can be described using equations. It is 4 of 5 in the series titled "Using Equations to Describe Proportions."
Unit Plan
CK-12 Foundation

Ck 12: Arithmetic:

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Solve for the unknown in a proportion using mental math.
Professional Doc
PBS

Pbs Learning Media: Think Math

For Students 5th - 8th Standards
Think Math offers a collection of 43 KET-produced resources from Math at the Core: Middle School, including 17 Scale City videos and interactives about proportional reasoning, 14 Wild Fractions animations and games that feature visual...
Interactive
ABCya

Ab Cya: Equal Proportions: Dirt Bike Proportions

For Students 4th - 6th
Start your engines! This racing game will speed up your math skills by challenging players to find equivalent fractions. The faster you solve the problems the faster the bike goes.
Lesson Plan
PBS

Pbs Teachers: Math Space Odyssey: How Much Do You Weigh in Outer Space?

For Teachers 3rd - 8th
Demonstrate the ability to apply the use of decimals, fractions, ratios and proportions to situations based upon given information about planets in the solar system.
Website
Other

The Futures Channel: Proportional Reasoning

For Students 9th - 10th
"Connecting learning to the real world" is the goal of the Futures Channel. Through the use of short videos, teachers can integrate real-world examples of how math and science are used in everyday life. Complete teaching guidelines...
Study Guide
Other

New York State Education Department: Eighth Grade Math, Book Three (2006) [Pdf]

For Students 7th - 9th
Part three of three; The March 2006 8th grade Math test from the State of New York. The test is 12 open-response questions dealing with topics such as algebra (solve for a variable, write function rules), geometry (translations, parallel...
Activity
Free Math Help

Free Math Help: Proportions and Ratios

For Students 9th - 10th Standards
The tutorial investigates proportions and ratios. The lesson includes explanations on solving problems with ratios using cross multiplication.
eBook
Math Planet

Math Planet: Algebra1: Ratios and Proportions and How to Solve Them

For Students 9th - 10th
Provides examples and a video lesson that explains ratios and proportions and shows how to solve them.
Unit Plan
Khan Academy

Khan Academy: The Sat Math Test: Problem Solving and Data Analysis

For Students 9th - 10th Standards
SAT Math questions fall into different categories; one of these domains is Problem Solving and Data Analysis. These questions might ask you to create an appropriate equation from a word problem, convert units, or understand the meaning...
Lesson Plan
PBS

Pbs Learning Media: Ratio/proportion: Targeted Math Instruction

For Teachers 9th - 10th Standards
At the end of this lesson about ratio/proportion, students will be able to recognize and apply ratios and proportions to solve real-life problems and solve for any unknown component.
Unit Plan
PBS

Pbs: Solve the Ratio and Proportion Problem Beyond a Shadow of a Doubt

For Students 6th - 8th
In this video, Harry finds money on the sidewalk. He uses ratio, proportion, and some knowledge about shadows to return it to the rightful owner. In the accompanying classroom activity, students investigate whether there is a consistent...
Unit Plan
Scholastic

Scholastic: Study Jams! Math: Algebra: Ratio

For Students 5th - 6th Standards
Explore word problems about ratios and watch and listen to all the steps needed to solve.
Website
Virtual Nerd

Virtual Nerd: How Do You Solve a Word Problem Using Unit Rates?

For Students 6th - 8th Standards
Word problems allow you to see the real world uses of math! This tutorial shows you how to take a rate and convert it to a unit rate. Then, you can use that unit rate to calculate your answer. Watch this tutorial to learn all about it!
Unit Plan
Education Development Center

Tune in to Learning: Math Lesson Working With Ratios

For Students 2nd - 5th
Did you know that chefs must know how to use ratios in order to prepare meals? Learn the value of understanding how to write ratios, ratio proportionality, and ratios in lowest terms in this interactive lesson. Based on real world...
Lesson Plan
PBS

Pbs Mathline Lesson: Mix It Up [Pdf]

For Teachers 3rd - 5th
A lesson based on the story, "Oliver's Fruit Salad," where learners explore the concept of proportional reasoning through modeling, student sharing, and questioning. A great introductory lesson for this concept that is sure to engage...
Unit Plan
PBS

Pbs: Scale City: Proportional Relationships in the Real World

For Students 6th - 8th
In this video, students visit the Kentucky Horse Park where they are introduced to the question How are speed, time, and distance interrelated? The accompanying activity builds on a demonstration from the video of the length of Man o'...
Unit Plan
PBS

Pbs: Real World Proportional Relationships: Gender Wage Gap

For Students 6th - 8th
Using this infographic, learn how wage equity today compares with data from 50 years ago, at the dawn of the equal pay movement. The accompanying classroom activity invites students to explore the change in the gender wage gap from 1965...
Activity
Amby Duncan-Carr

Amby: Proporion Method to Solve Percent Problems

For Students 9th - 10th Standards
Examples are solved to demonstrate using proportions to solve percent problems. Exercises are provided that allow you to check your answers.
Activity
The Math League

The Math League: Ratio and Proportion

For Students 9th - 10th Standards
Detailed explanations of ratio, comparing ratios, proportion, rate, converting rates, and average rate of speed, all with examples.
Unknown Type
Khan Academy

Khan Academy: Units

For Students 6th - 8th Standards
In this exercise, students solve word problems that involve using different units. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.