Visit Abstract Algebra On Line. This free course, based on the textbooks "Abstract Algebra" by John A. Beachy and William D. Blair, and "Abstract Algebra II" by John A. Beachy, is recommended for undergraduate students at junior or senior level. The course is also recommended as a first graduate level algebra course. You will find the entire course textbook, with or without frames, as well as the companion study guide and a full index of definitions and theorems on this site, maintained by Northern Illinois University Mathematics Professor John A. Beachy.
Brush up on the basics at SOS Mathematics free website. You will find college level courses in algebra, matrix algebra, differential equations, complex variables and many other advanced mathematics courses, as well as math refresher courses to help you prepare for the college level texts. SOS Mathematics provides free "cyberexams" for algebra practice as well as a "cyberboard" where you can ask questions or receive individual help from others. The site is maintained by three mathematics professors, Mohamed A. Khnasi Ph.D., University of Paris; Helmet Knaust Ph.D., University of Texas; and Nancy C. Marcus Ph.D., University of New Mexico.
Gain a better understanding of the basic concepts of algebra by taking the free online course "Understanding Algebra" by Professor James Brennon of Boise State University. This introductory level college algebra course covers topics such as linear equations, polynomials, exponents and roots as well as many other introductory topics. The online textbook contains nine chapters with explanations, example problems and practice work.
Explore the "Elementary Linear Algebra" curriculum, compiled by University of Queensland mathematics Professor Keith Mathews. This site provides a free, nine-chapter textbook online. Chapters include linear equations, matrices, complex numbers and other in-depth subjects. You will also find a lengthy list of suggested further reading.
Take advantage of free curriculum from Free-Ed.net. This website compiles a variety of courses and curriculum from the Internet, with a goal of providing quality free education for anyone. With this philosophy in mind, the Free-Ed.net provides links to free courses in college level algebra, including Intensive Algebra I and II, College Algebra 202 and Perspective on Algebra. The site offers drills and interactive tools, including an endless problem generator for additional practice with various concepts and principles in algebra.