This site teaches Reasoning with Equations and Inequalities to High Schoolers through a series of 5909 questions and interactive activities aligned to 36 Common Core mathematics skills.
This site teaches Structure in Algebraic Expressions to High Schoolers through a series of 3482 questions and interactive activities aligned to 26 Common Core mathematics skills.
The properties of organic molecules depend on the structure, and knowing the names of organic compounds allow us to communicate with other chemists. We'll be learning about different aspects of molecular structure, including common functional groups and conformations.
Allele frequencies in populations and how they differ from genotype frequencies. Created by Sal Khan.
Marginal Utility and maximization. Created by Sal Khan.
An overview of altering tables after creation
In 1944, the Americans (and Allies) make even more progress in the Pacific. By the end of the year, they have taken positions that put them within bombing range of Japan.
Introduction to amortization. Created by Sal Khan.
An example of simplifying a seemingly complicated resistor circuit. Created by Willy McAllister.
An overview of Animating DOM with setInterval
Learn how to use jQuery to animate elements in custom ways, like animating their sizes, borders, and spacing, to whatever values you specify.
An overview of Animating styles with CSS animations
An overview of Animating styles with requestAnimationFrame
Learn how to use jQuery to show, hide, and toggle elements with animation effects.
We can solve circuits by the direct application of the fundamental laws: Ohm's Law and Kirchhoff's Laws. (Part 1 of 2). Created by Willy McAllister.
We solve the equations created by direct application of the fundamental laws: Ohm's Law and Kirchhoff's Laws. (Part 2 of 2).
Using the Hardy-Weinberg equation to calculate allele and genotype frequencies. Created by Sal Khan.
Introduction to Archimedes' principle and buoyant force. Created by Sal Khan.
In this video we show you how to connect Bit-zee's Arduino micro-controller to his frame. Created by Karl Wendt.
This arithmetic lesson demonstrates more long division problems with remainders.[Arithmetic playlist: Lesson 26 of 38]