- Khan Academy
This is a great site with many "how-to" videos. See the Algebra as well as the Trigonometry and Pre-Calculus sections.
This site is an excellent site. See the links for Algebra topics.
- Hyper-Ad Technical Tutoring
This site offers some help with trig but there are also links for algebra and chemistry.
This site offers a "calculator" to help you solve problems. It does not show you how to solve the problems but provides the answers. Great resource to check your work or make up practice problems.