Khan Academy
Testing If a Relationship is a Function, Functions and Their Graphs, Algebra II
This short video looks at different points on a coordinate plane and answers a question about whether these points could represent a function. The answer is determined by looking at each point individually to determine whether, given a...
Khan Academy
Solving Equations with the Distributive Property, Linear Equations, Algebra I
Here is an equation in which the first step is to use the distributive property to remove the parenthesis. Then, it is solved for the variables. Since variables are on both sides of the equation, it is important to verify the answer by...
Khan Academy
Solving for F in Terms of C, Linear Equations, Algebra I
The instructor uses the temperature formula to illustrate how the variables can be manipulated to solve a problem.
Khan Academy
Recognizing Linear Functions, Linear Equations and Functions
Starting with a set of values for the x and y variables, this video shows how to tell whether these points determine a linear or non-linear function. Sal first defines linear functions in terms of the change in y over the change in x,...
Khan Academy
Dividing Mixed Numbers, Fractions, Pre-Algebra
Before Sal can divide a mixed number, he has to rewrite it as an improper fraction. He explains that dividing a fraction is the same as multiplying it by its reciprocal and that you can "cancel out" numbers to make multiplying easier.
Khan Academy
Solving Percent Problems, Decimals, Pre-Algebra
Converting percents to decimals, and the other way around, can be tricky. Sal shows young mathematicians how to simplify this process with two sample equations and one word problem.
Khan Academy
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.
Khan Academy
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.
Khan Academy
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.
Khan Academy
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
Writing a Number in Standard Form, Arithmetic Properties, Pre-Algebra
Viewing this Khan Academy video helps with grasping the concept of place value. Learners write the word six hundred forty-five million, five hundred eight-four thousand, four hundred sixty-two in standard form, using multiplication as a...
Khan Academy
Example 1: Multiplying a Binomial by a Binomial, Algebra I
There are particular ways to multiply binomials. One could use the FOIL method or employ the distributive property. Sal walks through each step of the FOIL method and then shows that using distribution results in the same answer. This is...
Khan Academy
Rounding Whole Numbers 2, Arithmetic Properties, Pre-Algebra
This is the second in a series of three Khan Academy videos on rounding whole numbers. Students watch Sal Khan round the number 423,275 to the nearest thousand by looking at the number in the hundreds place. If it is five or higher, you...
Khan Academy
Dividing Polynomials 1, Polynomial and Rational Functions, Algebra II
Divide two polynomial expressions by writing the problem as a fraction or as long division. Sal shows how to use long division to divide polynomials. A solid understanding of polynomial operations is necessary to grasp this video.
Khan Academy
Rounding Whole Numbers 3, Arithmetic Properties, Pre-Algebra
Sal Khan completes the three-part rounding series with this Khan Academy video on rounding to the nearest 10. He references the actions taken in video two, so students would be best served if all three videos were shown in sequence.
Khan Academy
Rounding Whole Numbers Example 1, Arithmetic Properties, Pre-Algebra
Rounding is an essential skill that must be used throughout the study of mathematics. This Khan Academy video is the first in a series of three. It shows how to round the number 24,259 to the nearest hundred, using a number line.
Khan Academy
Example 4: Adding and Subtracting Polynomials, Algebra Basics
Adding two polynomials begins with simplifying when possible. Sal demonstrates the process he uses to combine like terms and explains why the process works. This video would be great for those who need a quick refresher.
Khan Academy
Solving Radical Equations, Exponent Expressions and Equations, Algebra I
Continue your lecture on radical equations with this video, which features Sal solving a few more problems with his classic clarity and understandable way. Young mathematicians will benefit immensely from seeing his cool hand guide the...
TED-Ed
What Is Metallic Glass?
Metallic glasses are shiny and opaque, and they conduct heat and electricity like metals. They have a lot of characteristics that make them special and unique to most metals. But, what are they made of? Watch this video to discover what...
TED-Ed
The Genius of Marie Curie
Can you name the only person to win two Nobel Prizes in two different sciences? After watching a short video on the life, discoveries, and accomplishments of Marie Curie, you can!
TED-Ed
The Silk Road: Connecting the Ancient World Through Trade
Introduce learners to The Silk Road, the first world-wide web. The narrator of this short, animated video traces the pioneers of globalization and the impact they had on culture and economy. The Scythians, Darius the First, and Alexander...
TED-Ed
Can Wildlife Adapt to Climate Change?
Can humans protect other species from the effects of climate change? Can animals adapt or evolve fast enough to survive? Check out this video for some surprising answers.
TED-Ed
What Are the Challenges of Nuclear Power?
Engineering challenges, construction costs, and disasters are some of the challenges when it comes to nuclear energy. Watch a video that explains each of these and more in detail.
TED-Ed
A Cinematic Journey Through Visual Effects
George Méliès realized in the early days of cinema that, "Films have the ability to capture dreams." From classic movies like A Trip to the Moon, The Lost World, and Metropolis, to more modern marvels...