PBS
Human Tree: Ratios
Create a personal tree. By visiting an exhibit at the National Museum of Mathematics, the resource introduces the idea of fractals. The exhibit takes an image of the person and creates a tree by repeating scaled images on the shoulders...
PBS
Scale City — Proportional Relationships in the Real World
Strive to determine your stride. Scholars first view an informative video on the Kentucky Horse Park and the 28-feet stride of the Man o' War. They then work together in groups to find the length of their own strides by using the number...
PBS
Scale City — Similar Figures in the Real World
Bat a perfect thousand when learning about math and baseball. Scholars view an informative video on Babe Ruth and the Louisville Slugger Museum. They answer several questions on batting averages and scale models using ratios and...
PBS
Scale City — Scale Models in the Real World
Good things come in miniature packages. An interesting video from the Math at the Core MS: Ratios playlist introduces the collection of miniatures in the Kentucky Gateway Museum. Scholars use base-10 blocks to create scale models before...
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
Relative Reasoning in Finance
Take stock of your financial knowledge. As part of the Math at the Core MS: Ratios series, future investors consider the financial well-being and the environmental stewardship of companies in which to invest. They calculate an emissions...
PBS
The Lowdown — The Math of Credit Cards
Take credit for finding a great lesson on credit cards. Future consumers first learn about lines of credit and credit cards by watching a video. They then work through some problems on simple interest and monthly payments.
PBS
The Lowdown — Percents Combined: Proportional Relationships with Multistep Ratio and Percent Problems
Multiple discounts are always a good thing. Viewers of an informative video see how to calculate sale prices by applying multiple percent discounts. They also learn to determine the resulting total percent discount by multiplying ratios.
PBS
The Lowdown — Defining and Calculating Percents
Don't discount the lesson. Part of The Lowdown: Real-World Math series, an engaging video shows viewers how to calculate percent discounts using the idea that percents are ratios out of 100. It also looks at how to determine whether a 20...
PBS
Scale City — Scaling up Recipes and Circles in the Real World
What a great big skillet you have. The resource introduces the class to the world's largest stainless steel skillet. The class creates a model of the skillet and a typical 12-inch skillet and compares the relative sizes of their areas....
Anywhere Math
Percents of Increase and Decrease
Increase your class's knowledge of percent change several fold. Viewers of an informative video learn how to calculate percent increase and decrease. They also see how to determine percent error and look at examples of each type of...
PBS
Real-Life Math | Chef
Cook up a lesson on unit conversions. Scholars brainstorm how chefs use math in restaurants, and then watch a video of a real chef explaining how unit conversions, food and supply costs, portion sizes, and payroll all require math. They...
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 | Radiologist
How are radiologists like superheroes? Answer: They have X-ray vision and can do math. A short three-minute video and an associated lesson focus on how radiologists use math in their professional lives. It tasks learners with performing...
Mathed Up!
Best Buys
Which scenario is the better deal? Class members examine nine scenarios to determine which choice offers a better deal. Pupils decide whether they need to find unit costs or total prices to compare the two options.
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.
Krista King Math
Ratio and Proportion
Teach your classes how to solve a simple proportion. A video tutorial explains the process of cross multiplying to solve a basic proportion. The instructor reinforces the meaning of a proportion by solving an example by inspection.
Virtual Nerd
How Do You Solve a Proportion?
Use the means extreme proportion property to cross multiply and solve for the unknown variable in this proportion problem. Then use the division property of equality to isolate that variable and get your solution.
Virtual Nerd
How Do You Use a Proportion to Find a Part of a Whole?
There are two methods for finding the percentage of a number. One is to use an equation, and the other is to use a proportion. This tutorial demonstrates with clear examples how to implement the proportion method. Insert this video into...
Virtual Nerd
How Do You Use a Proportion to Find What Percent a Part is of a Whole?
Percent, parts, whole, how do these pieces fit together to solve a percent problem? Follow along as the instructor shows how to set this up as a proportion problem in order to solve it.
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: Ratio Problems With Basic Algebra
A step-by-step breakdown on how to solve ratio problems using algebra. Practice problems available. [5:12]
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]
