• Khan Academy

    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 for 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. Khan Academy's materials and resources are available to you completely free of charge.

    http://www.khanacademy.org/
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  • NetTrekker

    NetTrekker Search is an educational search tool for digital K-12 educational content dedicated to enhancing the education of today's youth with highly effective technologies that deliver rich educational content to every child in a safe, relevant, easy-to-use format. netTrekker brings standards-aligned, teacher-approved digital resources and a unique set of learning tools into the classroom to create an engaging 21st century learning environment. In partnership with other content and technology solution providers, netTrekker delivers even more high-quality, standards-aligned digital content and tools from trusted sources to support an engaging personalized learning experience for every student.
    http://www.nettrekker.com/us/
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  • Quizlet

    The world learns on Quizlet. Simple tools that let you learn anything for free.
    http://quizlet.com/
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