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How to Solve Equations of the Form x/a = b, Linear Equations, Algebra I
Help your students understand how to use their algebraic reasoning to solve a one-step equation, where they must solve for X. Add this video to a lesson or assign it as homework.
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Multiplying Fractions and Whole Numbers: Mixed Number Answer, Pre-Algebra
Here is a great video explaining multiplying a fraction by a whole number. Sal shows students how to put a whole number over 1 to multiply it by a fraction. He simplifies his answer and writes it as a mixed number.
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Adding Fractions with Like Denominators, Fractions, Pre-Algebra
Show your students this presentation to help them understand how to add fractions with like denominators. Sal adds 3/15 to 7/15 and then simplifies his answer. He uses drawings and multiple colors to show the actual process.
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Adding Mixed Numbers, Fractions, Pre-Algebra
This video will demonstrate adding mixed numbers. Sal explains that adding mixed numbers can be done by looking at the whole number separately from the fraction. Because his explanation is brief, this video would be great as a supplement...
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Scientific Notation Examples, Pre-Algebra
Explaining scientific notation is useful because "it allows us to write large or small numbers in ways that are easy for our brains to write down and understand." Sal proceeds to solve a few practice problems involving scientific...
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Multiplying in Scientific Notation (Example), Pre-Algebra
Apply the concept of scientific notation to a word problem involving the rate of speed. Sal explains how to express the answer using scientific notation.
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Worked Example: Determining an Empirical Formula from Combustion Data
Sal builds on the previous video, which shows students how to calculate the mass composition of a compound from its empirical formula. This problem uses the elements Hydrogen, Oxygen, and Sulfur. The process requires a lot of conversions...
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FRB Commentary 3: Big Picture
Summarizing his thoughts on creating the last few videos on the weaknesses of the fractional reserve, Sal goes on to explain why he believes the nature of this system is "disingenuous. " This leads to a discussion that contextualizes the...
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Fractional Reserve Banking Commentary 1
After a short review of the banking process and lending procedures, Sal outlines some of the problems and weaknesses of fractional reserve banking. Additionally, he details the differences between illiquidity and insolvency, as well as...
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FRB Commentary 2: Deposit Insurance
Going into more detail about the potential weaknesses of fractional reserve banking, this video introduces some of the ways the economy has been engineered to address these issues, such as the "lender of last resort" and insurance...
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Fisher Esterification
Sal presents the situation of a solution of a carboxylic acid (such as heptanoic acid) with an alcohol (ethanol) in the presence of a sulfuric acid catalyst. He explains the esterification process.
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How to Use the Quadratic Formula, Polynomial and Rational Functions, Algebra II
It's the video your algebra class has been waiting for - Sal explains the quadratic formula! He describes it as "one of at least the top five most useful formulas in mathematics" and recommends that it be memorized, provided one also...
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sp3 Hybridized Orbitals and Sigma Bonds, Structure and Bonding, Organic chemistry
This video reviews many of the concepts covered in the regular chemistry playlist. Sal tries to draw and clarify how to visualize the multiple x, y, and z orbitals. He elaborates on probability clouds and the sp3 orbital configuration of...
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SAT Prep: Test 6 Section 7 Part 3
Sal finishes problem 10 in this video, as well as problems 11-13 on page 735. Students can practice skills such as linear functions, slopes, and calculating permutations. Problem 12 allows viewers to see the process of elimination in...
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SAT Prep: Test 2 Section 6 Part 3
Sal's dedication is clear in this video, which takes place on Thanksgiving Day. The problems focus on algebra (averages and linear equations) and geometry (perimeters and angles). Viewers beware: Sal makes a self-professed error on...
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SAT Prep: Test 5 Section 9 Part 1
Reasoning through the methodology of a new set of problems from page 679 of The Official SAT Study Guide, Sal shows students how to find the ins and outs of increasingly difficult math problems. He advises them to thoroughly think over...
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SAT Prep: Test 4 Section 4 Part 1
The next section of the practice SAT from The Official SAT Study Guide (page 594) covers simple linear equations and geometric figures. Students will appreciate Sal's quick problem solving and thought process, which is easy to understand...
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Adding/Subtracting Negative Numbers, Pre-Algebra
Guiding viewers through the addition and subtraction of numbers, this video includes many tips to help new learners internalize the concept of a number line. It clarifies the relationship between positive and negative numbers, including...
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E1 Reactions, Substitution and Elimination Reactions, Organic chemistry
This video builds upon the previous topic and explains how the elimination reaction between moderately electronegative molecules is controlled.
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Banking 10: Introduction to Leverage (Bad Sound)
Demonstrating not only the working definition but also the mathematical model of financial leverage, Sal shows viewers how leverage can keep a bank safe—or multiply its losses. Particularly helpful for a class session on bank regulation...
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Solving Linear Systems by Substitution, Algebra Basics
Another method for solving systems of equations, in addition to graphing, is the focus of this video, as Sal demonstrates the substitution method. It's important to understand that there is more than one way to solve any problem,...
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Multiplying and Dividing Rational Expressions 2, Algebra II
Provide your algebra class with some review of rational expressions in this video. Sal uses several sample problems to demonstrate the process, and his explanations are clear and easy to follow.
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Unit conversion Within the Metric System, Pre-Algebra
This video focuses on metric unit conversion. Sal introduces the necessary prefixes before launching into several mathematical examples. His easygoing manner and explanative annotations will undoubtedly help those who get a little stuck...
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SAT Prep: Test 3 Section 4 Part 2
Sal explains how helping his young cousins with their math skills inspired him to make this series of videos, so he can help a bunch of people pass the SAT. In this video, he covers exponents, quadratics, and parabolas in problems 5-9 on...