Khan Academy
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...
Khan Academy
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.
Khan Academy
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...
Khan Academy
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...
Khan Academy
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...
Khan Academy
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...
Khan Academy
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...
Khan Academy
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.
Khan Academy
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...
Khan Academy
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.
Khan Academy
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...
Khan Academy
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...
Khan Academy
SAT Prep: Test 8 Section 5 Part 3
Have a blast with Sal as he solves these SAT practice questions! He enjoys himself with visualization and combination problems, showing not only how to solve the problems but to see math as a riddle rather than a threat.
Khan Academy
Markovnikov's Rule and Carbocations, Alkenes and Alkynes, Organic chemistry
Markovnikov's rule is explained in the context of pent-1-ene and Hydrogen bromide. There is a review of electronegativity, which is helpful for viewers, and a recap of how valence electrons behave. The explanation for Markovnikov's rule...
Khan Academy
SAT Prep: Test 6 Section 3 Part 1
With the beginning of another practice SAT session from The Official SAT Study Guide, Sal plows through problems 1-4 on page 716. He emphasizes the importance of narrowing down potential answers in a multiple-choice problem, as well as...
Khan Academy
SAT Prep: Test 2 Section 9 Part 1
Sal works up an appetite for his Thanksgiving turkey in this video, which takes students through the first five problems of a new set of SAT practice questions from The Official SAT Study Guide. Problems involve algebraic word problems,...
Khan Academy
SAT Prep: Test 8 Section 2 Part 1
Test eight from The Official SAT Study Guide includes eighteen problems, the first four of which are featured in this video. Basic algebraic expressions, linear equations, tangent circles, and coordinates on a plane test algebra and...
Khan Academy
SAT Prep: Test 6 Section 3 Part 5
Some students enjoy math problems as "brain teasers," while other students are just trying to get through them. Sal addresses both learners in this video, which shows different ways to approach and solve problems on the practice SAT.
Khan Academy
SAT Prep: Test 7 Section 8 Part 1
A new set of SAT practice questions from the Official SAT Study Guide (page 803) greets Sal and the viewer. Problems 1-7 involve basic algebraic equations, linear equations, and geometric figures.
Khan Academy
SAT Prep: Test 4 Section 8 Part 1
Beginning with problems 1-7, Sal works on the next section of the practice SAT from The Official SAT Study Guide (page 611). The problems include simple algebraic equations, square roots, word problems, and graphing.
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SAT Prep: Test 1 Section 6 Part 3
Sal is having a blast in this video, and his fun-loving attitude will rub off on even your most stressed-out test-takers. Problems 7-10 in the practice SAT require skills in linear equations, as well as approximation and basic algebra.