Curated Video
Cold Neptunes: An Exoplanet Sweet Spot?
A new statistical study of planets found by a technique called gravitational microlensing suggests that Neptune-mass worlds are likely the most common type of planet to form in the icy outer realms of planetary systems. The study...
Amoeba Sisters
Mega Genetics Review
Ready to review how to do different types of Mendelian and Non-Mendelian Punnett square problems with The Amoeba Sisters? This video reviews one-trait / monohybrid crosses, two-trait / dihybrid crosses, incomplete dominance, codominance,...
Professor Dave Explains
IIT/JEE Chemistry Practice #8: Molecular Formulas
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Catalyst University
Pulmonary Function Tests (PFTs) | Examples 1 & 2
In this video, do a couple examples of pulmonary function tests for obstructive and restrictive defects.
Curated Video
Does "100% Humidity" Mean Air Has Turned to Water?
Humidity is simply a measure of how "wet" the air is in a specific place, or the amount of water vapor present in the air. However, it's important to note that humidity is an umbrella term that can refer to three different types of...
Curated Video
Applying Tax, Tip, and Discount: Using Proportions and Scale Factors
Through a real-life example of a pair of sneakers on sale, this video demonstrates step-by-step how to find the scale factor, calculate the discount, and determine the final cost. The video emphasizes the importance of understanding the...
Curated Video
Interpreting Two-Way Tables Using Relative Frequency
This video lesson is the second video instruction how to create two-way tables. This video will review what a relative frequency is and how to find the relative frequency. Topics covered: two-way tables, bivariate data, relative...
TMW Media
Atomic Theory of Matter Part 2
This program covers part 2 of the very important topic of the atomic theory of matter. We discuss how atoms combine together to form new compounds. Students review the law of conservation of mass and how the mass of the substances at the...
Curated OER
Percent Tip
How much am I supposed to tip for this meal? Many have asked this question. The instructor uses a visual to first set up the known numbers and then writes the ratios to solve the problem.
Curated OER
Solving Word Problems with Percents
There are 20 kids on a bus, 60% of them have blue backpacks. How many is this? The teacher shows how to solve a percentage word problem using proportion ratios.
Curated OER
Percent Discount
The concept of percent discount is very clearly explained in this informative tutorial. Learners will work through a real life discount problem using algebraic reasoning and a clearly outlined procedure. This is a good video.
Curated OER
How Do You Find Equivalent Ratios?
Ratios are a comparison of numbers. So given a ratio, how can an equivalent ratio be written? Just multiply or divide, both the numerator and the denominator, by the same value. The result will be different numbers, but equal values that...
Curated OER
How Do You Solve a Proportion by Finding an Equivalent Ratio?
Find the missing value in this proportional equation. Look at the relationship of the two numerators and the two denominators to solve this proportional ratio.
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
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...
Teacher's Pet
Percent Yield
How do chemists know if they've done a good job performing a reaction? They use the percent yield equation! Introduce the calculation that often determines success (or otherwise) in the lab with a short video. The narrator explains...
PBS
Real World Ratio and Rate Problem: Bianca’s Fifty Percent Solution
Fifty percent off can still be quite expensive. Future consumers watch a video showing an irresponsible young shopper overspending in a 50 percent off sale. They then use store ads to calculate 10, 25, 50, and 75 percent discounts on items.
Curated OER
How Do You Figure Out a Percent of Change?
First identify the parts of the word problem. Next identify the variable, decide what formula to use, figure out the quantities, insert the quantities into the equation, and now solve. There are many parts to solving this word problem so...
Curated OER
Percent Tax
Learn how to set up a proportion to determine how much additional tax you have to pay for an item.
Corbett Maths
Expressing Ratios as Fractions or Percentages
Fractions and percentages are just as useful as ratios. An educational video describes how to express ratios as either fractions or percentages. It looks at several real-world examples to adequately cover the topic, including ratios that...
Curated OER
Another Percent Word Problem
Guavas are on sale in this video. Here two examples are shown to calculate a discounted rate.
Education Development Center
What's Cooking? Carbohydrates
Chef Jamika is at it again, highlighting math and science in her cooking demonstrations. In this episode, ratios and fractions are introduced within the main topic of carbohydrates and the direction for making succotash! The general...
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....
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