Government of Alberta
Learn alberta.ca: Math Interactives: Rate/ratio/proportion (Video Interactive)
The use of rate, ratio, and proportion is illustrated in this video about action photography. An additional interactive element allows students to explore equivalent ratios equivalencies through enlarging and reducing images to compare...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Find an Unknown in a Proportion 2
This video shows how to find an unknown quantity in a proportion in the context of a word problem. Practice problems are available. [5:48]
Khan Academy
Khan Academy: Algebra: Find an Unknown Proportion 2
A step-by-step breakdown on how to solve an application problem with an unknown proportion. Practice problems available. This video also appears in the strand Arithmetic and Pre-Algebra: Ratios and Proportions. [5:48]
Khan Academy
Khan Academy: Algebra: Find an Unknown in a Proportion
Video demonstrates how to find an unknown in a proportion three different ways including algebraically with cross multiplication. This video also appears in the strand Arithmetic and Pre-Algebra: Ratios and Proportions. [7:20]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Understanding Proportions
This video showing how to determine if a given proportion is true or false. Practice problems are available. [1:25]
Khan Academy
Khan Academy: Algebra: Understanding Proportions
Short video explaining how to understand proportions. This video also appears in the strand Arithmetic and Pre-Algebra: Ratios and Proportions. [1:25]
Khan Academy
Khan Academy: Algebra: Ratio and Proportion
Step-by-step instructions on how to solve ratio and proportion word problems. This video is also found in the strand Algebra: ck12.org. [10:25]
PBS
Pbs Learning Media: I <3 Math: Percent as a Rate
This "I <3 Math" episode uses real-world comparisons to convert rates into equivalent percentages.
PBS
Pbs Learning Media: I <3 Math: Unit Rates
This "I <3 Math" episode defines unit rates and discusses their relationship to ratios. [2:01]
PBS
Pbs Learning Media: I <3 Math: What Is a Ratio?
This video is an introduction to the concept of ratios that provides real-world examples. This "I <3 Math" episode defines ratios, discusses combining ratios, and demonstrates the correct ways to write ratios. [2:37]
PBS
Pbs Learning Media: Math in Fencing: Division of Clock Time
Learn about the mathematics of fencing, including the ratio of touches to time remaining that an athlete needs to mentally calculate in order to stay in the match, in this video from Center for Asian American Media. In the accompanying...
PBS
Pbs Learning Media: Real Life Math: Nurse
In this video, learn how mathematics--specifically, proportion, ratio, rate, and conversions--are used in the professional responsibilities of a registered nurse working on the surgical trauma floor. In the accompanying classroom...
Loyola University Chicago
Math Flix: Proportion Similar Figures
This QuickTime movie applies the concept of proportion to similar geometric figures. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept. Allow loading time.
Khan Academy
Khan Academy: Ratios and Proportions: Ratio and Proportion
This video solves a problem involving ratio and proportions.
Planet Nutshell
Planet Nutshell: Math Shorts: Unit Rates
Planet Nutshell Math Shorts provide animated videos that explain various math topics. On this site students learn about unit rates.
Khan Academy
Khan Academy: Ratios With Algebra: Find an Unknown in a Proportion
Video demonstrates how to find an unknown in a proportion three different ways..
Khan Academy
Khan Academy: Ratios and Proportions: Understanding Proportions
This video shows how to determine if a given proportion is true or false.
Sophia Learning
Sophia: Pre Algebra: Indirect Measurement
Indirect measurement using shadows and proportions is explored in this video lesson. The tutorial includes a very detailed example of the concept.
Sophia Learning
Sophia: Proportions, Ratios, and Rates
This video lesson describes how ratios are related to rates and proportions. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Ratio Reasoning
This video lesson demonstrates how to use ratio reasoning to solve real-world math problems. The tutorial includes detailed examples.
Sophia Learning
Sophia: Solving More Difficult Proportions With an Unknown
This video lesson demonstrates how to solve proportions with an unknown variable. The tutorial includes detailed examples.
Planet Nutshell
Planet Nutshell: Math Shorts: Proportional Relationships
Planet Nutshell Math Shorts provide animated videos that explain various math topics. On this site, students learn about proportional relationships.
Imagine Learning Classroom
Learn Zillion: Lesson Video: Identify Scale Factors Using Rectangle Side Lengths
In this lesson, you will learn to identify scale factors by exploring the side lengths of rectangles. [4:52]
Loyola University Chicago
Math Flix: Using Proportion
This QuickTime movie gives examples of how to use the concept of proportion. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.