Thinkwell: Begins with Pre-Algebra and moves through Beg Algebra, Intermediate, and College (Advanced) Algebra. Trig and Calculus round out offerings. Geometry is under development but not available at this time. Sample lessons and materials can be viewed at the website: http://www.thinkwell.com/ There is a detailed table of contents available for each course to help you decide what level would be appropriate.
The program rests on what we consider very high quality, engaging teaching delivered on CD-Rom viewed from your computer. The instructor is Edward Burger, who blends humor with clear explanations. Each 10 to 12 minute lesson is followed by an optional online quiz of 10 to 15 questions that are progressively more difficult as you work them. Wrong answers are identified and a step by step explanation and solution is provided. Graded quizzes are kept on the Thinkwell site. Homeschool families use Homeschool pages vs. institutional. A print text is available, but not necessary, the program rests on the computer.
Thinkwell has been used in colleges and universities but is being used more widely in homeschool high school math programs. Sonlight began carrying their calculus titles this year, see reviews for more comments. (See additional comments below).