Never play pool against a mathematician! An entertaining and informative video demonstrate the real-world application of ellipses and the angle of incidence with an elliptical pool table.

Do you know about The Enchantress of Numbers? Ada Lovelace wrote the first computer program, more than a century before the first modern computer. Her knowledge and vision continue to inspire mathematicians today. 

This modern animation and discussion of the ancient secrets of Pascal's triangle manages to be topical, engaging, and mathematically deep all at the same time. A great introduction to the power of number theory across multiple math...

Roughness is everywhere, contributing to the incredible complexity of the world around us. This complexity, however, is not without it's own unique sense of order. Join world-renown mathematician Benoit Mandelbrot as he looks...

Many young mathematicians get slightly confused when they are introduced to the concept of exponents. This resource will ensure that they never get confused again. Sal explains, quite emphatically, that six to the eighth power is NOT the...

Your young mathematicians can solve this problem along with Sal. They will add 4/9 and 11/12 by finding a number that evenly divides both 9 and 12. Sal fully explains the process of finding a common denominator in an evident and...

Use this video to show older elementary mathematicians that they can compare numbers using the same thinking that they did when they were in the first grade. Sal compares decimal numbers using the greater than and less than symbols. He...

Introduce young mathematicians to the concept of factoring trinomials with perfect squares. This descriptive video provides a meaningful explanation of the factoring process. Each step is carefully written out in various colors during...

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...

Sal helps with data organization in this video, which focuses on stem and leaf plots. Clarifying that "this is just one of many, many, many ways to visualize data that you will run into in your mathematical or statistical futures," he...

Armed with their newfound (or refreshed) knowledge of the quadratic formula, viewers can now work with Sal to prove the formula - an essential skill that is often ignored in algebra. Once they learn how to both use and prove the...

Beginning with a "handful of fairly simple inequality videos," Sal demonstrates a few inequality problems in which mathematicians must add or subtract. Though he states that his goal is to familiarize viewers with the notation, his...

Price increases in real life aren't enjoyable, but Sal's enthusiasm and easygoing explanation makes the question on increasing prices on the practice SAT fun! Showing students how to easily work through problems involving the Pythagorean...

Using pie graphs and multiple variables, Sal carefully (yet efficiently) moves through problems 5-8 of this practice SAT session (page 839 from The Official SAT Study Guide). Both beginning and advanced mathematicians will appreciate...

This video provides a reasonable explanation for blossoming mathematicians, explaining the difference between average and central tendency, as well as arithmetic mean, median, and mode. Those who haven't grasped these concepts in algebra...

Explaining the distance formula as "an application of the Pythagorean Theorem" might relieve some of your young mathematicians who are scratching their heads at all the new concepts. Sal demonstrates how to take the distance between any...

Teaching young mathematicians to use consistent units in their expressions and numbers, Sal demonstrates several ways to translate speed units in pre-algebra. He encourages viewers to memorize common speed units, such as the number of...

Transitioning between algebra and geometry is no problem for Sal as he deftly solves these practice SAT problems. Mathematicians who have a hard time moving between skill sets will appreciate the way that Sal addresses each new problem...

Young mathematicians will appreciate Sal's careful - yet efficient - methods for solving these typical SAT problems. He takes care to explain problems 8-12, but gets cut off in the middle of problem 12 (to be continues in the next video).

Sal takes your class’s newfound (or growing) knowledge of graphs of lines to the next level. He presents a few word problems that mathematicians must understand to use linear function graphs.

With his trusty graphing calculator, Sal begins his lecture on solving quadratic functions by graphing. The video is a good way to show young mathematicians not only how to use the graphing calculator (which Sal describes as "archaic"...

Elucidating the concept of box-and-whisker plots, Sal explains not only how to generate the diagram but also how to read one. He uses several examples to help young mathematicians become familiar with the format and explains its...

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.

Watch this video with your junior engineers or your higher-level mathematicians. In it, Drew builds half of an arch bridge with building blocks. There happens to be a magnetic board behind the blocks, on which he affixes a magnet for...