Select Page These math lessons were created in honor of Dr. Lee V. Stiff and Marvin Pittman, nationally recognized experts, scholars,  and advocates for equity in mathematics education.

The goal of this series of short videos is to help intelligent students who fear having to change their chosen paths due to math gaps. These short lessons are designed to fill in the gaps in understanding of basic mathematical concepts that many very intelligent people missed.  The topics covered here were identified in a multi-year research study of students enrolled in college algebra and students being tutored for post-secondary high-stakes math tests.  The study found that straightforward explanations of these concepts along with concrete examples resulted in a greater than 90% pass rate.  Additionally, some students went on to be successful in majors that required several college-level math classes.

These lessons are designed to be done in order.  Even if you think you understand a topic, watch the video anyway because it may show you a new way to look at a topic that makes other things easier.  If you are studying for a high-stakes test, take practice tests as you watch these videos.

Subscribe to the YouTube channel and you will be alerted as new videos are available.

1. Basics of Negative NumbersKhan Pratice Adding and Subtracting Negatives

Khan Practice Subtracting
This lesson explains how to add and subtract with negative numbers in a way that will make things to come make more sense.
2. Multiplication of FractionsKhan Practice Multiplying FractionsThis lesson reviews multiplying fractions. This lays the groundwork for other basic concepts that follow. You may see things in a different, simpler way after viewing this series.
3. Fixing Foundational ConfusionKhan Order of Operations PracticeThis lesson looks at foundational beliefs that may cause confusion in math. A more fool-proof way to use order-of-operations is provided.
4. Using Properties to Make Things EasierKhan Properties

Khan Properties
This lesson reviews the properties of algebra and how to use them to solve equations.
5. Example: Order of OperationsSimplifying ExpressionsThis lesson shows how to simplify an expression using order of operations. We show how to simplify problems in ways that reduce the chance of error.
6. Factors and MultiplesKhan Practice Factors

Khan GCF

Khan GCF and LCM Word Problems
This lesson explains how to find factors and multiples of numbers.
7. ExponentsKhan ExponentsThis lesson reviews how to work with exponents, and explains what they mean so that you can remember the rules of dealing with them.
8. Example Problems From High-Stakes TestsMcGraw-Hill ACT Pracitce TestsIn this lesson, example problems from the McGraw-Hill practice ACT test are worked and explained.
9. Pythagorean TheoremKhan Pythagorean TheoremThis lesson reviews the Pythagorean Theorem and how to use it.
10. PercentsKhan Fractions to PercentsThis lesson shows how percent relates to fractions and decimals. A percent is an equivalent fraction, with 100 as the denominator.
11. Review of Percents to Prepare for Word ProblemsKhan Review of PercentsThis lesson reviews some math concepts that you should already know, but may not think of and this will help make solving percent word problems easier.
12. Percent Word ProblemsKhan Percent Word ProblemsThis lesson explains how to think about and solve percent word problems. It recommends Khan Academy lessons to use to practice.
13. Number SenseThis video reviews underlying assumptions that students often don't realize are unique to specific number types.
14. Solving EquationsThis lesson reviews how to solve linear equations and walks through a couple of examples.
15. Examples Worked 1Khan Praxis PercentagesThis lesson walks through a percent word problem from the ETS Praxis Practice Math test.
16. Examples Worked 2Khan Reasoning PraxisThis lesson works through a question on the sample Praxis math test from ETS. This is an example of a question that you have to reason your way to the answer, and use a few basic math concepts in doing so.
17. Examples Worked 3Khan Reasoning Praxis

Khan Patterns
This lesson works through a question on the sample Praxis math test from ETS. This is an example of a question that at first glance looks like it would take hours of tedious work to answer, however, it can be answered quickly by finding a pattern.