The websites listed below can be used to learn about the 8th grade math standards. They provide notes, examples and practice problems.
When you get to the following websites, you must type in the topic you need to find. Example: type exponents or scientific notation
Math - Instructional Videos / Examples
http://www.khanacademy.org/math/algebra
Math - Notes / Explanations / Examples
http://www.purplemath.com
http://www.mathisfun.com
When you get to the website below, scroll down the page to find the topic you need by the standard number. See the "Week at a Glance" for the current unit standards.
8th Grade CCGPS Practice
http://www.ixl.com/standards/georgia/math/grade-8