Contains many of the definitions and theorems from the area of mathematics generally called abstract algebra. Intended for undergraduate students taking an abstract algebra class at the junior/senior level, as well as for students taking their first graduate algebra course. http://www.math.niu.edu/~beachy/aaol/
A Quick Review of Algebra: Written in TeX and converted to the Adobe PDF format. Tutorial is a review of high school algebra in 10 lessons and is designed to prepare a student for the Math Placement Test at The University of Akron. http://www.math.uakron.edu/~dpstory/mpt_home.html
21st Century Problem Solving introduces how to solve problems reliably in Grade school through grad school and beyond in all subjects that use mathematics for problem solving http://www.hawaii.edu/suremath/intro_algebra.html
An introduction with math and a little history intended for those having a familiarity with ordinary real numbers and algebra. http://www.clarku.edu/~djoyce/complex/
The Irrationality of the Square Root of Two, from the Platonic Realms Interactive Math Encyclopedia. http://www.mathacademy.com/pr/prime/articles/irr2/
Free sequential math lessons for high school Grade 9 Algebra. Assignments included in each lesson 1 - 12. http://www.lessontutor.com/ltalgebra9home.html
Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math problems instantly.
http://www.math.com/students/worksheet/algebra_sp.htm
Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources also available. http://www.purplemath.com/
Solving Story Problems; advice for students from the Platonic Realms Interactive Math Encyclopedia. http://www.mathacademy.com/pr/prime/articles/storprob/