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A free Algebra 1 course just came out this week, this one from Curriki, a provider of free, K-12 open educational resources. This is a full course, broken into modules, so you can use it in its entirety, or just the parts you want. The course includes lesson plans, with links to related Khan Academy videos, worksheets and assessments with their answer keys, and each unit ends with a real-world project. If you haven't been on Curriki yet, click on over. They've got lots of good stuff and the site's pretty easy to search.
Another free Algebra 1 course just newly released is available from SAS Curriculum Pathways. Also modular with video lessons.
Other free high school math courses are available at:
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For all you homeschoolers out there who like to solve math word problems, here’s an interesting site: the Virtual Math Club. Each week, a set of problems is posted, with answers and video solutions following later in the week. According to the site, the problems are most suitable for middle- and early high school students and are similar to those found on math contests.
Here’s a sample:
A standard checker board has 64 squares alternating black and red on an 8 by 8 grid. How many of the 1296 rectangles on a checkerboard contain more than one red square?
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