PBS
Scale City — Proportions and Music in the Real World
Masterfully mix math and music. Pupils first watch a video about the music instrument calliope on the riverboat Belle of Louisville. They then conduct an activity where they investigate how the length of the strings on a string...
PBS
The Lowdown — The Math of Trash: Percents and Proportions
Don't toss the lesson in the trash. Scholars watch an informative, up-to-date video that discusses how percents and proportions help clarify data about trash, recycling, and climate change. They consider their own trash output and create...
PBS
Recognize and Represent Proportional Relationships between Quantities: Ratio, Proportion, Cross Multiply, and Divide
Review three video clips for one major concept. The resource contains three short clips to introduce the idea of ratios and proportions and how to solve a proportion. After watching the video, partners use their noses to push pom poms...
PBS
To Scale: The Solar System
To scale, or not to scale ... that is the question! Show scholars the solar system in correct proportion with a lesson from PBS's Space series for middle school. Two versions of the model-building exercise illustrate the planning process...
Corbett Maths
Equations – Cross Multiplication
Mastering the art of solving a proportion is not only important for algebra, but it's crucial to geometry and statistics as well. A quick video demonstrates the use of cross multiplication to solve a proportion. The lesson includes...
PBS
Real-Life Math | Nurse
Quick, nurse, grab a calculator! A role-playing activity has groups measure vitals, such as heart rate, blood pressure, weight, etc. After viewing a video on how nurses use math in the workplace, scholars apply knowledge of rates and...
PBS
Real-Life Math | Woodworker
Woodworking is math-intensive work. Viewing a video of a woodworker explaining how he applies math in his craft sets the stage for a crafty lesson. Pupils use ratios and proportions to create scale drawings of objects.
Anywhere Math
Solving Proportions
It's all proportional. Learners watch an instructive video that explains how to solve proportions. the resource covers how to use mental math by reducing one of the sides of the proportion and then applying a multiplicative relationship....
Anywhere Math
Percent Proportion
You'll be 100 percent satisfied with a helpful math video. Scholars watch an engaging YouTube video to learn how to solve percent problems (finding the part, finding the whole, and finding the percent). The method employed here is to set...
Anywhere Math
Proportions
They're different, yet somehow still the same. Pupils watch an informative YouTube video that focuses on proportions. The video works through several examples of determining whether two different ratios are equivalent. It also shows how...
Anywhere Math
Comparing and Graphing Ratios
Finding a unit rate is imperative to the smart shopper! A video lesson introduces learners to a comparison of ratios. Initially, the instructor manipulates the ratios to have a common denominator for better comparison. He then explains...
CK-12 Foundation
Segments from Chords: Lesson
Strike a chord length. The section of a larger playlist on geometry introduces the relationship relating lengths of intersecting chords. Using the relationship, the video shows how to find lengths of segments of the chords.
CK-12 Foundation
Similar Polygons and Scale Factors: Lesson
Develop an understanding of the scale of similarity. Starting with the concept of congruency, the resource introduces the idea of similarity between two figures. As part of a larger playlist on geometry, it defines similarity and uses...
CK-12 Foundation
Parallel Lines and Transversals: Lesson
Segment transversals proportionally. Given a diagram with three parallel lines and two transversals, the narrator of a short video points out the parallel lines cut the transversals proportionally. The portion of a long playlist on...
CK-12 Foundation
Proportions: Lesson
Proportionally, one doesn't see much of cross multiplying in geometry. The portion of extensive playlist on geometry reviews proportions. Using properties of equality, the video shows why cross multiplying works for proportions.
CK-12 Foundation
Triangle Proportionality: Lesson
Look at proportionality from a parallel perspective. A section of an expansive geometry playlist introduces the Triangle Proportionality Theorem. Using the theorem, the video shows how to determine missing measurements in triangles.
CK-12 Foundation
Proportions with Angle Bisectors: Lesson
Half at one end becomes proportional on the other. As part of a basic geometry playlist, the video introduces the Angle Bisector Theorem. The presentation uses the theorem to find missing lengths in triangles.
CK-12 Foundation
SAS Similarity Theorem: Lesson
When given two sides and an angle, make similar triangles. The video describes the SAS Similarity Theorem. Using the theorem, the segment of a larger geometry playlist determines whether two triangles are similar.
Bozeman Science
NGSS: Scale, Proportion and Quantity
Many processes in the universe are either too small and fast or too large and slow to easily observe. The third concept in the Next Generation Science Standards addresses this with lessons on scale, proportion, and quantity. A video...
Math Antics
Proportions
Equivalent ratios lead to proportions. The video provides the definition of a proportion and provides examples of proportions. Using real-world examples, the resource shows how to solve for unknown quantities in proportions using the...
3Blue1Brown
Snell's Law Proof Using Springs
Does light always travel in a straight line? The narrator of a short video discusses the path light travels when going between different mediums and points out that light will want to travel on the path that minimizes the travel time....
statisticsfun
How to Calculate Margin of Error Confidence Interval for a Population Proportion
Teach how to find a confidence interval from a population proportion and margin of error with a video that reviews how to find a population proportion and a margin of error. The instructor then explains how to create a confidence...
Krista King Math
Complex Fractions, Ratio and Proportion
Show the class two methods to solve proportions of fractions. The instructor shows that complex proportions can be solved by the normal method of cross-multiplying. It also shows another method where the complex fractions are simplified...
Krista King Math
Ratio and Proportion for Chemical Compounds
Explore the strong connection between mathematics and science. Learners see how to use proportions to determine the makeup of chemical compounds. The example shown finds the number of grams of oxygen in a given amount of water.