Purplemath: Lessons and Tutoring: Reviews

Fall for a series. Learners determine how to find out how far a skydiver falls in the first 20 seconds. The Algebra II lesson introduces the idea of adding up the terms of an arithmetic sequence. Pupils learn how to use Sigma notation to...

Purplemath contains about 40 different lessons on various algebra topics. The lessons are divided into five different sections: preliminary topics, beginning algebra, intermediate algebra, advanced algebra, and word problems. The lessons...

Twenty-eight problems present a variety of practice graphing ordered pairs. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button to...

Pre-Algebra and algebra lessons, from negative numbers through Pre-Calculus. Grouped by level of study. Lessons are practical in nature, informal in tone, and contain many worked examples and warnings about problem areas and probable...

Pre-algebra and algebra lessons, from negative numbers through pre-calculus. Grouped by level of study. Lessons are practical in nature informal in tone, and contain many worked examples and warnings about problem areas and probable...

This lesson offers a thorough explanation of functions, domain and range, and how to find them. Includes multiple example problems and graphs. Great review tool for Algebra students.

An "identity" is a tautology, an equation or statement that is always true, no matter what. Proving an identity is very different in concept from solving an equation. This resource demonstrates some useful techniques for proving...

Algebra teacher Elizabeth Staple offers answers to the question, "How do you really do this stuff?" Detailed and down-to-earth, Purplemath has dozens of graduated and cross-referenced lessons, links to other valuable resources, and...

Fifteen problems presented on the topics: mean, median, mode, outliers and graphing statistics. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...

Nineteen problems to solve using linear equations. The solutions are only available with a paid subscription. To review the basics on this topic, click the "View Lesson" button at the top.