Most learners likely are not familiar with Statis Myrivilis or his anti-war writings, but his works spur scholars to debate over the role of protest literature in wartime. While the video does situate Myrivilis within the context of the...

While many can identify Ernest Hemingway's famous works, they may be unaware of his service during World War I and how that affected his literary contributions. An video details Hemingway's service in World War I and explains events and...

Explore music through the decades with an engaging video brought to you by the 5-part harmony acapella group, Pentatonix. Genuine musical talents sing through a variety of popular music from the 11th century to the 2010's. Artists...

Shark teeth in Idaho, China, and Russia confused scientists for hundreds of years. A spiral of sharp teeth presented the first clue, but where would they even go on a shark? Learn more about the strange case in a video that is part of a...

Who was Joseph McCarthy and why is his name synonymous with witch hunts? What were the factors that permitted the political repression of the 1950s to flourish? Could the same thing happen today? An intriguing video traces the rise and...

Pop! Why does bending your joints in a certain way cause a cracking sound? This fascinating video delves into the synovial fluid and "bubbles" that exist in your in the space between stretched out joints, as well as debunks...

What do tulips, real estate, and stock in a pet store have in common? Find out what happens when products or services sell for much more than they are worth.

Should we remember Richard Nixon only for his abuse of power and the scandal that resulted in the end of his presidency? Here is a fantastic TedEd video illustrating major highlights from Nixon's term as president of the United...

Did you know that the Declaration of Independence was signed on July 2, 1776? Did you know that five men, not just Thomas Jefferson, are credited with writing the Declaration? Did you know that references to slavery were excised from the...

The example problem is this video has a sequence of numbers that decrease by a fixed amount with each iteration, and one needs to find the 100th number in the sequence. Sal shows the listener how to find the pattern between the number...

Sal uses the formula for perimeter to show how the variables can be moved around to solve a problem. He demonstrates a few different ways to do this.

An example of writing an algebraic equation of the pattern of blocks that grows at each iteration is shown in this video. Sal shows how to find the pattern by looking at the iteration number and number of blocks. He then continues this...

We look at a number of different examples of functions and see what their domain is. Sal writes the domain in set notion and shows how different functions can have different input values that cause the function to be undefined.

After defining a simple function from a word problem, a short video shows how one could find the domain and the range of that function. The instruction reinforces the definitions of domain and range with a concrete example.

Are odd numbers connected to odd functions and even numbers to even functions? This video tries to clarify that connection. It also talks about functions that are neither odd nor even to give a more intuitive feeling about classifying...

In this video, a complex number is defined and graphed on the complex plane. Sal also shows how to add, subtract, and multiply two complex numbers. He starts showing how to divide two complex numbers, but runs out of time and continues...

Finding the area of each of the triangles that are created by drawing two diagonal lines through a rectangle is explored in this lecture. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use...

Guavas are on sale in this video. Here two examples are shown to calculate a discounted rate.

Providing an exploration of parallel lines, this resource requires students to not only practice calculations, but also to analyze angles. By asking viewers to decide whether two lines are parallel based upon the information given, this...

While exploring the concept of transversals, Sal discusses corresponding angles, congruent angles, and opposite/vertical angles. He provides a thorough summation of these mathematical concepts. It is the first installment in a series...

Students are always fascinated by imaginary numbers. In this video, Sal defines the imaginary unit, i, and shows when raising i to an exponent it has a cyclic nature.

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,...

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...

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.