For Middle/High School Kids

Learn to Code — Learn the technical skills to get the job you want. Join over 50 million people choosing Codecademy to start a new career (or advance in their current one).

Love math? Hate math? Need homework help? This site's for you!

This interactive e-book collection for grades 3–6 offers users a safe, simulated Internet experience with hands-on instruction on how to deal with important online safety issues.

The world's best way to learn a language. With our free mobile app or web and a few minutes a day, everyone can Duolingo. Learn 30+ languages online with bite-size lessons based on science.

The Exploratorium isn't like other museums. Here, visitors of all ages can tinker, test, notice, and play with more than 600 interactive exhibits.

Online educational games for kids of all ages. (math, grammar, science, spelling, history)

Celebrate computer science everywhere! Anyone, anywhere can organize an Hour of Code event. One-hour tutorials in over 45 languages. No experience is needed.

HowStuffWorks explains thousands of topics, ranging from the flu to black holes to conspiracy theories, with video and illustrations.

We’re a nonprofit with the mission to provide a free, world-class education for anyone, anywhere.

Learn Economics, Understand Your World.

Open-and-go lessons that inspire kids to love science!

Building better writers.

The aim of PhysicsQuest is to introduce students to the basic concepts of physics, through fun experiments that will sustain their interest in math and science.

Shmoop is an education technology solutions company that provides engaging digital classroom tools and solutions aimed at easing the stress of the learning environment. Shmoop’s four core products support grades 6-12.

We created the learning lab so anyone can quickly discover and adapt authoritative subject-relevant resources.

TED-Ed is TED’s youth and education initiative. TED-Ed’s mission is to spark and celebrate the ideas of teachers and students around the world. Everything we do supports learning — from producing a growing library of original animated videos, to providing an international platform for teachers to create their own interactive lessons, to helping curious students around the globe bring TED to their schools and gain presentation literacy skills, to celebrating innovative leadership within TED-Ed’s global network of over 650,000 teachers.

Webmath is a math-help web site that generates answers to specific math questions and problems, as entered by a user, at any particular moment. The math answers are generated and displayed real-time, at the moment a web user types in their math problem and clicks "solve." In addition to the answers, Webmath also shows the student how to arrive at the answer.