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.
NetTrekkerNetTrekker 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.
QuizletThe world learns on Quizlet. Simple tools that let you learn anything for free.