Curated OER
How Do You Set Up a Proportion from a Word Problem?
In this word problem, the skill to remember is to match up the similar measurements. This means the inches match up with the inches and the feet match up with the feet measurements. This problem is a ratio and is written as fractions....
PBS
Soul Food Junkies: Portions
Serve up a rate of percents. The Math at the Core resource investigates the percent of daily value of sodium and saturated fats in different foods. Pupils determine the number of serving sizes they eat of popular snack foods and...
Curated OER
What is a Scale Drawing?
Scale drawings are an easy and plausible way to represent large things, such as roads and buildings, on paper. This tutorial explains what a scale drawing is and uses the example of a house to demonstrate how a scale drawing works. It...
Curated OER
How Do You Solve a Proportion Using Cross Products?
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.
Socratica
Empirical Formula
With empirical formulas, it's all about keeping it simple! Introduce the concept of empirical formula to your chemistry scholars through a detailed video from Socratica's Chemistry Lessons series. The resource uses visual cues,...
National Education Association
Rates and Proportions
Clarify complex math concepts with a helpful video. Learners view ways to work with ratios and proportions while discussing vocabulary and notation. After solving proportions, they apply the new strategy to word problems.
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 | 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...
California Academy of Science
Coral Reefs and Climate Change
Coral reefs cover less than one percent of the ocean floor, yet more than 25 percent of marine life lives in coral reefs. A colorful, engaging video describes the health of coral reefs and why the formations matter. The first lesson in a...
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...
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.
Curated OER
Basic Rate Problem
A simple rate problem is looked at in this video. The listener needs to compute whether four trains each going different distances over different amounts of time are moving at the same constant rate. This problem reinforces ones basic...
Jacob Clifford
Money Multiplier & Reserve Requirement
What is the money multiplier, and how does it affect the total increase of money supply? Mr. Clifford explains the difference in how the money supply changes when the Federal Reserve System purchases bonds versus when an average person...
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