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 — 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 — Percents Defined
Out of every 100 times, how many times was the lesson a success? Scholars first watch a short video from The Lowdown: Real-World Math series to learn about the meaning of percents. They then color in 10-by-10 grids to express percents...
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...
SciShow
How Can the Universe Be Flat?
Flat, positively curved, or negatively curved ... what is the true shape of the universe? Scientists use many indirect measurements to base their theories on the shape of the universe. Using an installment from the SciShow Space series,...
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 | Estate Appraiser
Real estate is all about location, location, location—and perhaps a little bit of math. A set of two videos has real estate appraisers describe the work that they do. Scholars discuss how mathematics plays a role in these jobs to...
PBS
Real-Life Math | Zoo Keeper, Birds
Birds of a feather flock together, so it's easy to estimate their number. Pupils watch an installment of a larger Real-Life Math series in which a zookeeper explains how she uses math to estimate the number of birds. They then try out...
PBS
Real-Life Math | Athletic Trainer
The lesson is sure to get scholars' blood pumping. An athletic trainer highlights some uses of math in athletic training in a heart-pumping video. After watching it, pupils get together in groups to measure their resting heart rates and...
PBS
Real-Life Math | Physical Trainer
Train yourself to naturally use math. Young mathematicians first watch a video in which a personal trainer describes math concepts necessary in his daily professional life. After measuring their heart rates, they apply percentages to...
PBS
Real-Life Math | Health Educator
Get healthy using math (although exercise helps, too!). Future consumers analyze a set of nutritional labels to compare caloric and nutrition information for two cereal brands. After watching a video of a health educator explaining how...
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...
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
Ratios and Ratio Tables
There's no equivalent to the video. Young mathematicians learn about ratios by watching a short YouTube video. It focuses on writing ratios for contextual situations and finding equivalent ratios using ratio tables.
Anywhere Math
Rates
At this rate, you'll learn about rates in no time. An instructional YouTube video first shows how to determine unit rates. It then provides and solves two examples of real-world problems involving unit rates and pricing.
Anywhere Math
Ratios and Rates (Advanced)
At this rate, you'll know all about ratios in no time. Scholars view a short video that discusses advanced concepts regarding ratios and rates. They first determine the speed of a subway from a graph, and then find unit rates given...
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
Similar Solids: Lesson
Blow up a solid by a scale factor. A section of a larger playlist on basic geometry introduces the ratios of the surface areas and volumes of similar solids. Using the ratios, the video works several examples involving similar figures.
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
Special Right Triangle 30-60-90: Lesson
It is special—given one length, you can find the other two. A segment of a basic geometry playlist provides the ratio of the lengths of sides of a 30-60 right triangle. The presentation shows how to use the ratio to find side lengths...
CK-12 Foundation
Special Right Triangle 45-45-90: Lesson
Square roots connect squares and right triangles. Using the Pythagorean Theorem, the video shows the relationship between the sides and hypotenuse of a 45-45 right triangle. The portion of a larger geometry playlist applies the...
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.