Khan Academy
MTEL Math Practice Test: 28-30
Problems 20-30 of the MTEL Practice Math Test involve skills such as measuring rates and graphing equations. Sal helps viewers with the process of elimination in multiple-choice tests and explains how to solve various types of...
Khan Academy
MTEL Math Practice Test: 16-19
Providing quick lessons on lattice multiplication algorithms and inequalities, Sal takes viewers through problems 16-19 on the MTEL Practice Math Test. His calm and knowledgeable narration and easy-to-read annotations of each problem...
Khan Academy
MTEL Math Practice Test: 1-4
Are you worried about the MTEL? Never fear—Sal is here! Designed for adults seeking their teaching credentials in Massachusetts, this series of videos guides future teachers through a practice test for the Math MTEL. The valuable...
Khan Academy
Singapore Math: Grade 3a, Unit 1 (Part 2)
As part of a series on numbers less than 10,000, a thorough presentation demonstrates how to visualize numbers in groups of a thousand. The instructor then describes how to read and write numbers less than 10,000.
Khan Academy
Singapore Math: Grade 3a, Unit 1 (Part 1)
Using a step-by-step approach, Sal from Kahn Academy visually describes what a group of 10, 100, and 1,000 means. It explores the value of numbers less than 10,000. The example is easy to understand. He puts marbles in a can, and the...
Khan Academy
Singapore Math: Grade 3a, Unit 2 (Part 4)
Use the Singapore math methods to work through simple problems. Visual representations of word problems allow viewers to start making predictions and estimating the answers. This is a good way for class members to use various methods to...
Khan Academy
E2 E1 Sn2 Sn1 Reactions Example 3
Building on the previous video, Sal further explains different situations and the reactions that would occur in each.
Khan Academy
Chair and Boat Shapes for Cyclohexane, Organic Chemistry
After recapping the tetrahedral shape of a regular methane molecule and the standard 109-degree angles between hydrogens, Salman Khan demonstrates the chair and boat diagrams to represent cyclohexane. A primary focus of these diagrams is...
Khan Academy
Introduction to Reaction Mechanisms, Alkenes and Alkynes, Organic Chemistry
Starting with an example of how bromide might react with various alkenes, this lecture illustrates how valence electrons and electronegativity influence the likelihood of reactions.
Khan Academy
Naming Simple Alkanes, Organic Chemistry
Salman reviews the justifications for naming molecules based on their composition. He gives a valuable list of traditional prefixes and shows multiple examples of naming alkanes.
Khan Academy
Naming Alkenes Examples, Alkenes and Alkynes, Organic Chemistry
Sal "expands his repertoire" and starts to demonstrate the naming of long, complicated alkene chains.
Khan Academy
Representing Structures of Organic Molecules, Biology
Sal starts this video by looking at a traditional chain of carbons and working through the different ways they can be diagrammed.
Khan Academy
Carboxylic Acid Naming, Carboxylic Acids and Derivatives, Organic Chemistry
Sal draws out versions of carboxylic acids and justifies the naming procedures.
Khan Academy
Khan Academy: Phagocytes in Immunity
A description of nonspecific immunity, and the specific role of phagocytes. Understand how phagocytes engulf pathogens that enter the body as a line of defense. [16:19]
Khan Academy
Khan Academy: Bozeman Science: Mitosis and Meiosis
Video lecture explains the two kinds of cell cycle, mitosis and meiosis, and their importance. [13:38]
Khan Academy
Khan Academy: Statistics: Standard Deviation
Video reviews the population and sample mean and variance then expands to population and sample standard deviation. Gives examples of calculating the standard deviation. [13:07]
Khan Academy
Khan Academy: Algebra: Multi Step Equations 1
A video that demonstrates how to solve a multi-step equation. The equation contains all integers. [4:33]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Distributive Property Example 1
This video provides several examples of using the distributive properties of multiplication and division to rewrite expressions. Practice problems are available. [5:39]
Khan Academy
Khan Academy: Algebra: Complex Numbers: Number Sets
Video first reviews what natural numbers, whole numbers, integers, rational numbers, irrational numbers and real numbers are. Gives examples of classifying numbers. [5:17]
Khan Academy
Khan Academy: Geometry: Similar Triangles
Explains how to determine unknown side lengths of similar triangles by identifying corresponding sides and angles ans setting up proportions. The first example is a continuation from the video "Similar Triangles." Practice problems...
Khan Academy
Khan Academy: Pre Algebra: Adding and Simplifying Radicals
Video showing how to add and subtract radicals by first simplifying the radicals. Video is also included in the Algebra: ck12.org strand. [7:57]
Khan Academy
Khan Academy: Calculus: Polynomial Approximation of Functions (Part 2)
Video lesson finishing the derivation of the formula for the Maclaurin series and then applying it to find the polynomial approximation for e^x. [10:09]
Khan Academy
Khan Academy: Peopling the Americas
Many believed the first people in America came after the voyage of Christopher Columbus. We now know this to be false. There were thriving civilizations already settled on this land before 1492. This video answers the following three...
Khan Academy
Khan Academy: Charlemagne and the Carolingian Revival
Did you know we can credit Charlemagne with the invention of the question mark? During the reign of Charlemagne, there was a revival of classical learning. Charlemagne knew he had to rebuild Europe and bring stability to the region. He...