Explore the idea of equality through the lens of linear equations. Two friends have a specific amount of money in savings and plan to add to it each week. A video lesson shows how to determine when their total amounts in savings is...

Understanding place value is a basic mathematics skill. This Khan Academy video shows students how to write the number 14,897 in the expanded form. He explains that the 7 in the ones place is equivalent to 7x1, the 9 in the tens place is...

No matter how it is written, it still is a line. A video shows class members how to take points and write the equation of the line that goes through those points. It then outlines how to develop the equation whether...

To add or subtract ... how do you make the decision? The video instructor explains the process of writing a numerical expression from a verbal expression. While writing the expressions, he provides explanations for his decisions.

There are a lot of moving parts in this word problem. There are three variables, and then there's writing out an equation. Oh my! The best thing to do is watch this video and take some good notes as the teacher explains each and every...

Here is a fairly basic video that uses three equations, each written in slope-intercept form, to determine whether the lines are parallel. Sal graphs each equation on the same coordinate plane to show how their slopes compare. The video...

Groupings are the way to go! The short video provides a description of the associative property of addition and gives an example. Learners view how to write the property using variables.

Quick and to the point! A well-designed lesson describes how to write the equation of a linear function. Highlighting the slope and y-intercept, the video instructor explains how to put them together to create the equation in three...

Variable expressions can take many shapes and forms. Learners review the different components of many different variable expressions in a straightforward video lesson. After introducing vocabulary, the instructor uses context to write...

A vector contains magnitude and direction. The video and associated questions introduce the class to vectors that are made up of scalars and displacement. Pupils read more about vectors to find them in real life and how they are used in...

Occasionally, in mathematics, there are "shortcuts" one can take. Sal explains a quick way to divide decimal numbers. He demonstrates that in some instances, simply shifting the decimal point to the left will result in a correct answer.

Word problems. Raise your hand if you love word problems! Don't see any hands raised? Watch this video as the teacher demonstrates how to identify the variables and match them up with given values in the word problem. Then she writes an...

What are the properties that can be associated with the definite integral? The AP Calculus video lists nine properties of the definite integral and provides explanations of why the properties hold for integrals in language that is...

Gay-Lussac first published the law relating the volume and temperature of gas, but he kindly credited Charles in what is now known as Charles's Law. Part of Socratica's chemistry playlist, the video explains Charles's Law. It also works...

With an enthusiastic instructor who writes clear steps on a whiteboard, this video demonstrates how to solve an inequality by dividing by a negative number. What makes this video stronger is the second part of the video, in which the...

Much like unicorns, or the pot of gold at the end of the rainbow, people have been searching feverishly for the Higgs boson since its existence was first theorized. Part one of two videos shows pupils how scientists knew that the...

Connect the commutative property to commuting. The quick video shows how to use the commutative property to write sums and products in a different way. It provides examples to show that the property only works for addition and...

Science is full of big numbers, each of which can be several digits long. Learn how to determine the appropriate amount of numbers to display in answers as well as how to shorten those big numbers down to only a few and still display the...

The sun and the moon have very different sizes but appear roughly the same size in the sky. An interesting video lesson discusses the reason behind this fact through by analyzing scale. The video instructor expands the lesson by...

Functions serve an important function in mathematics. Viewers of an illuminating video learn basic concepts related to functions. They see how to identify independent and dependent variables, write functions to model scenarios, and...

Approach inequalities in a new way with this video! This video gives step-by-step instruction on how to solve a 2-step inequality and then graph the answer. Learners could use this video as a reference as they do homework, or you might...

Approach inequalities in a new way with this video! This video gives step-by-step instruction on how to solve a two step inequality and then graph the answer. Learners could use this video as a reference as they do homework, or you might...

Length times width times height. Yes, the formula for the volume of a rectangular shape. But the values are monomials. Use the knowledge you have to multiply the monomials and then write it in simplest form.

A word problem, chemistry, and percent? I know you want to throw your hands in the air and run away from this problem, but please don't. Pay close attention as the instructor helps you unpack this word problem to set up an equation that...