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Dominate math and science.

Braingenie builds deep mastery and sharpens problem-solving skills.

• Learn, practice, and quiz yourself on 5,000+ skills.
• Compete in real-time multiplayer matches.
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A free world-class education for anyone anywhere.The Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere. All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get a leg up in earthly biology. The Khan Academy's materials and resources are available to you completely free of charge.

 IXL's math skills are aligned to the 2010 Common Core State Standards and the 2008 Washington Standards, providing comprehensive preparation for the Measurements of Student Progress (MSP). With IXL's state standards alignments, you can easily find unlimited practice problems specifically tailored to each required standard.