Practice is an important learning tool. This practice problem allows students to apply their know-how to factoring a binomial with a difference of squares. Sal explains his process briefly, making this video suitable for those already...

Sal adds a few more steps to these problems as he solves algebraic equations with two steps, though he states that "there's more than one way to do it." Those who become confused by increasingly complicated algebra problems on a test...

Exploring a world with more than one bank, Sal illustrates the balance sheets of each fictional bank and explains the possible problems that could result from inconsistent reserve ratio requirements. The video details how one bank run...

With bright, simple diagrams, Sal explains the role of the Federal Reserve in determining lending rates between banks. He also discusses open market operations and the way the Fed connects to Congress and the U.S. Government.

"Sal, why do we care? Why must we rationalize denominators?" Acknowledging these (possibly pleading) concerns, Sal explains the reasons behind rationalizing a denominator before demonstrating how to do it several times. Though he admits...

This video proves the helpful change of base formula for logarithms. The proof steps may need to be more intuitive to most logarithm learners, but the algebraic manipulation shown using logs is interesting.

Where in the world can you find a $26 sandwich? That's not uncommon in the oil-rich country of Angola, where many goods must be imported and are expensive. The West African nation is enjoying a resurgence since a brutal Cold War era...

Sal's hypothetical company is selling socks online, and he must write a business plan. He discusses the basics of starting a new corporation and asset development. Learners see through the case study how shareholders divide ownership,...