Khan Academy
MTEL Math Practice Test: 31-35
Applying algebra and geometry skills, a set of problems tests the viewer with questions about area, radius, and proportions. An excellent review for even the most confident future math teacher, the video is sure to help with the correct...
Khan Academy
Scale of Solar System, Scale of the Universe, Cosmology and Astronomy
After the previous video in this series, class members should have a general grasp of the relative sizes of the Earth and the Sun. This video provides further information about the distances between the planets and offers a sense of...
Khan Academy
Stellar Distance Using Parallax, Cosmology and Astronomy
As a follow-up to the Khan Academy video on parallax, this video focuses on parallax as it relates to astronomical distance. Sal uses cardinal directions and the seasons to help students orient themselves in the proverbial night sky....
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Ether Naming and Introduction, Organic Chemistry
Beyond using ethers as an example of an aprotic solvent (as in most of the previous videos), Sal describes the molecule diethyl ether with its IUPAC name and provides more detail about its properties. This video assumes your class will...
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Angles (Part 3), Angles and Intersecting Lines, Geometry
As preparation for the angle game, a geometry video covers the concepts of parallel lines, transversals, slope, opposite angles,, and corresponding angles. It is the third part of a series detailing the rules and laws regarding angles.
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Scale of Distance to Closest Stars, Scale of the Universe, Cosmology and Astronomy
The third video in a series based on the scale of the universe, this lecture uses great images to help expand on the idea of scale. By comparing the distance to the closest star to the progress of Voyager 1 and 2, the narrator gives the...
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Chinese Inflation, Money, Banking and Central Banks, Finance and Capital Markets
After examining the rapid increase in China's money supply, Sal provides a simple breakdown of how this may be impacting domestic price inflation in China. He reads through an article excerpt that asserts the reported inflation rate is...
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China Pegs to Dollar to Keep Trade Imbalance
Continuing from the previous video, Sal reviews the China-US trade relationships and the floating currency scenario that should leave the dollar weaker and the Yuan stronger. He explains why the People's Bank of China doesn't want this...
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Interest (Part 2), Interest and Debt, Finance and Capital Markets
Another example of simple interest and compound interest (compounded yearly) is explored in this video.
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Economics of a Cupcake Factory, Inflation, Finance and Capital Markets
Sal is starting a cupcake factory and walks learners through the cost and profit calculations necessary for any new business. He uses simple numbers for the start-up costs, overhead, product price, and cost per cupcake. Sal writes out...
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Cupcake Economics 3, Inflation, Finance and Capital Markets
This video continues to use the business model of a cupcake factory and explains how prices are driven.
Khan Academy
Cupcake Economics 2, Inflation, Finance and Capital Markets
The continuation of the lecture regarding a cupcake business. Sal provides some prominent and relevant examples of the costs and profits that may arise under different circumstances. He references an Excel spreadsheet that is available...
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Wealth Destruction 1, Finance and Capital Markets
What happens when a homeowner is paying more towards a loan than the house is worth? In a timely examination of the housing bubble (and its inevitable pop), Sal looks at five hypothetical home purchases from 1995 and their notional...
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The Housing Price Conundrum, Current Economics, Finance and Capital Markets
In this video and the next three, Sal examines how the data illustrates the supply and demand in the housing market. Sal examines the theories behind what could drive housing prices to increase faster than the supply-and-demand balance...
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Simple Analysis of Cost per Job Saved from Stimulus
What's Sal's take on the economic stimulus package? He breaks down some government-provided statistics to determine the total price per job created.
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ROA Discussion 1, Stocks and Bonds, Finance and Capital Markets
Introduce young economists to the concept of return on assets with this clip, which begins with an overview of various theories on calculating ROA. Sal writes out four formulas and explains why he uses the last one: EBIT divided by...
Khan Academy
Review of China US Currency Situation
This short clip is essentially just a review of what Sal has discussed in previous videos about the China-US trade situation. He goes over all the details, discussing the trade imbalance and how the Chinese government maintains the...
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Raising Money for a Startup, Stocks and Bonds, Finance and Capital Markets
Sal's hypothetical company is selling socks online, and he must write a business plan. He discusses the basics of starting a new corporation and asset development. Learners see through the case study how shareholders divide ownership,...
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Price and Market Capitalization, Stocks and Bonds, Finance and Capital Markets
As Sal introduces a series of videos on investing, he gives scholars an overview of stock investments and asset valuation. Using two hypothetical stock prices, he poses the question of the relative price per share. What is expensive and...
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Partial Fraction Expansion 3, Partial Fraction Expansion, Precalculus
In the last video on partial fraction decomposition, Sal shows how to solve a fraction with a repeated factor in the denominator. He runs through this interesting problem and gives some insight into how to solve these types of problems,...
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Partial Fraction Expansion 2, Partial Fraction Expansion, Precalculus
Partial fraction expansion is further explored in this video. The example problem shown here is of a higher-degree polynomial than the one explored in the first Khan Academy video on this subject.
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P/E Discussion, Stocks and Bonds, Finance and Capital Markets
Can looking at the price per share tell a buyer the value of a stock? Not necessarily, Sal explains as he calculates the price-to-earnings ratio to demonstrate this relativity. He reminds learners to consider the source of a company's...
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P/E Conundrum, Stocks and Bonds, Finance and Capital Markets
To present a potential inconsistency in the price-to-earnings ratio, Sal creates a scenario based on two entrepreneurs who each purchase a pizzeria with identical assets. The first pays the entire cost outright, while the second pays 10%...
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More on IPOs, Stocks and Bonds, Finance and Capital Markets
Although mainly reviewing previous videos, Sal delves further into the details of IPOs and explores the reasons companies raise equity and others purchase it. As he describes the assets and equity of a business, note there is an error in...