Khan Academy
Khan Academy: The Sat Math Test: Problem Solving and Data Analysis
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...
Khan Academy
Khan Academy: Solving Proportions
Practice solving basic proportions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Writing Proportions
Practice writing proportions to describe real-world situations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Math.com
Math.com: Similar Figures
This example provides a clear explanation of how to compare figures to see if they are similar and the formula to determine if the ratios are equal. Interactive practice activities are provided.
University of Cambridge
University of Cambridge: Maths and Sports: The Fastest Cyclist
As a coach for a long distance cyclist, can you come up with a race plan to help him win his ride from Lands End to John o' Groats? This activity is a more challenging follow-on from Nutrition and Cycling and is aimed at secondary...
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.
Other
All Elementary Mathematics: Proportionality and Ratio
A brief explanation of the mathematical relationship between ratio, proportion, and proportionality. Examples are included.
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.
Free Math Help
Free Math Help: Proportions and Ratios
The tutorial investigates proportions and ratios. The lesson includes explanations on solving problems with ratios using cross multiplication.
PBS
Pbs Learning Media: Math + Arts: Dragon Scales
In this lesson plan, students create a class mural by using scale, ratio, and proportion. Media resources and teacher materials are included.
PBS
Pbs: Real World Proportional Relationships: Gender Wage Gap
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...
AAA Math
Aaa Math: Ratios
This short exercise gives the student a ratio in reduced terms, and then gives the students a replacement value for one part of the ratio. The student is then to input the other part of the replacement ratio so as to keep the two ratios...
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....
Cool Math
Coolmath: Coolmath4kids: Dirt Bike Proportions
Find the number which makes the fractions equal in this multiplayer race!
Math Playground
Math Playground: Problem Solving Videos
"Rated 'M' for middle school," Math TV invites you to tune in each week for videos of word problems being solved. Back episodes are available in subjects such as percentages, number sense, and fractions. Watch a problem worked out, then...
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.
E-learning for Kids
E Learning for Kids: Math: Dance Performance: Position on a Map
This interactive website allows students to practice their map skills including scale factors on a map.
National Council of Teachers of Mathematics
The Math Forum: Means Proportional and Geometric Means
Dr. Math helps a student discover the meaning of the mean proportional of two numbers. Detailed explanation with examples.
Ducksters
Ducksters: Kids Math: Ratios, Fractions, and Percentages
This page explores how ratios can be written as fractions. The site also discusses proportions and reducing ratios with problems and examples.
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...
Free Math Help
Free Math Help: Direct Variation
The discussion examines direct variation. Students learn about the math concept through definitions and sample exercises.
ClassFlow
Class Flow: Math Ratio
[Free Registration/Login Required] The teacher will use this lesson plan flipchart to review simple problems.
Shmoop University
Shmoop: Ratios & Percentages: Solving Proportions
Students learn how to solve proportions. The mathematics resource consists of examples and practice problems with answers.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Similarity
This site contains a lesson plan for high school age students. The objective is to discover the factor of proportionality in similar polygons and to relate this factor to the perimeters and areas of similar polygons.