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6 minGeometry lesson4 CQ
The math problem covered in this lesson appeared in an MIT admission test in the year 1869, and is a good test of geometry concepts. Give it a try!
3 minFREEGeometry Nerdy CurioFree2 CQ
As we kick off a new year, let us ponder our we've "shaped" our world. A Nerdy Curio all about flat surfaces, stability, and the power of three.
2 minFREEGeometry lessonFree2 CQ
In this lesson, a young learner helps kids understand a foundational mathematical concept—how to solve for the hypotenuse of a right angle triangle!
19 minFREEAlgebra lessonFree10 CQ
The Pythagorean theorem is one of the most important ideas in geometry. Learn to use Pythagoras’ theorem to solve triangles, diagonals, and more!
5 minFREEGeometry lessonFree3 CQ
Want to know how to find the shortest distance from a point to a line? Math teacher Al Richards demonstrates how using analytic geometry and trigonometry.
9 minFREEAlgebra lessonFree5 CQ
The Pythagorean theorem is an essential mathematical equation used in the study of algebra and geometry. Learn how to use it to solve for different variables.
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325 min3-part Biology course14 CQ
Preparing for the AP Biology exam? In this three-part course, get clear explanations of Darwinian evolution by natural selection, modern evolutionary theory, and the history of life on Earth.
7107 min7-part iOS Development course57 CQ
Looking for a programming language that can do some heavy-lifting but doesn't take years to master? When programming for iOS, OS X, and watchOS, Apple's programming language Swift is the best choice!
11163 min11-part iPhones + iPads course88 CQ
Want to get the most out of your iPhone? This course from tech expert Todd Olthoff is the perfect guide, for everything from basic installation to built-in app features.
41572 min41-part Arduino course303 CQ
Want to build a new robot friend? How about create a cool LED sign? Whatever the gadget may be, get started with this beginner-friendly Arduino course from Open Source Hardware!
1270 min12-part Science course41 CQ
If you're looking for fun activities for kids that are equal parts science and craft, you'll love this course with lessons covering everything from homemade oobleck to egghead gardens.
6103 minFREE6-part Engineering courseFree54 CQ
Building a custom gaming computer can be easy when you have a step-by-step guide. Learn how to install each component—from the motherboard to the graphics card—and build a high-performance gaming PC!
643 min6-part Hardware course25 CQ
If you’re looking to put together an electronic prototype that will last, you’ll want to solder the parts together. In this course, learn how to use a soldering iron on sensitive electronics.
11145 min11-part Hardware course80 CQ
Want to become a certified computer genius? Take on the rewarding challenge of building and customizing your own PC. CPU Modder reveals the necessary parts and calls out beginner PC builder mistakes.
11112 min11-part Computer Science course61 CQ
You've likely heard about hacking and tried to protect your online identity from hackers. But what is hacking, who does it, and why? In this complete web hacking basics course, answer these questions!
1240 min12-part Basic Computing course26 CQ
If you're new to either computers or Windows 7 and want to learn how to navigate this easy-to-use operating system, this beginner-friendly course from Instructor Gadget is for you.