Khan Academy
Similar Triangles, Similarity, Geometry
Although a rather complicated topic, this video clearly explains the concept of solving problems involving similar triangles. It employs problem-solving to determine whether two figures are similar triangles. In addition, it provides...
Khan Academy
Similar Triangles (Part 2), Similarity, Geometry
Building on concepts in the first part of the series on similar triangles, installment number two explores how to find the values for given angles in a triangle. These problems are solved by using algebra and ratios. A step-by-step...
Khan Academy
SAT Prep: Test 1 Section 6 Part 2
Using the process of elimination, Sal takes students through helpful ways to solve multiple choice questions on the SAT quickly and correctly. Problems 5-6 involve probability and proportions.
Khan Academy
SAT Prep: Test 4 Section 2 Part 6
If students require deeper explanations on algebra problems, this video (which ends this practice SAT session) would be beneficial. Sal goes into detail about his methodology and thought process behind some of the more difficult problems...
Khan Academy
Unit Conversion: Gallons to Quarts, Pints, and Cups, Pre-Algebra
Provide your students with the context and information they'll need to convert gallons to quarts, pints, and cups. In this video, Sal defines gallons, quarts, pints, and cups. Then he uses this information to solve a problem where he...
Khan Academy
MTEL Math Practice Test: 31-35
Applying algebra and geometry skills, a set of problems tests the viewer with questions about area, radius, and proportions. An excellent review for even the most confident future math teacher, the video is sure to help with the correct...
Curated OER
What's the Means-Extremes Property of Proportions?
Watch how easy solving proportions can be. Using the means-extremes property of proportions you'll be able to solve a variety of proportion problems. Example problems are worked to show you how this property looks in action. Hint:...
Curated OER
What are the Means and Extremes of Proportions?
What's a proportion? Is it a comparison of fractions? Are the fractions of equal value? Is it a ratio? Are the ratios equal? Watch this video and see the instructor explain the answers and she will tell the special names for the terms in...
Math Playground
What is a Ratio?
Explore the concept of ratios with this film. Using pennies and nickels, an instructor shows how to describe a ratio. However, I think the use of money might be a bit confusing. Prior to showing this video, you may want to clarify that...
Math Playground
What are equal ratios?
Using a visual means, this video explores comparing ratios. This is a terrific way to approach the topic since it is a difficult concept for learners to understand. It is worth showing to the whole class, every mathematician can benefit...