Learn how to add JavaScript to your website in just a few minutes! Teacher Sam Cogan teaches how to use the JavaScript language with HTM documents.

JavaScript may be a simple language, but debugging it can be a chore. In this lesson, learn how to avoid common syntax errors and debug JavaScript code..

Learn the basics of JavaScript variables in this short lesson. Sam Cogan teaches how they work, and shares some basic rules to follow while you code

The various variable data types in JavaScript can be confusing to beginners, but they don't have to be. Learn the basics of JavaScript variable data types!

You can’t lay strings and variables end to end and expect JavaScript to know what you’re doing! Learn to use JavaScript string concatenation to combine them.

Writing instructions directly into the browser only takes you so far. In this lesson, learn JavaScript functions to start interacting with the user.

You don’t need a JavaScript button to trigger an event; learn to use JavaScript event handlers to call functions based on a range of mouse actions.

A JavaScript function doesn’t have to yield the same value every time you call it. Learn to use function parameters to make functions flexible.

What is a radical equation? An equation with a radical in it! In this lesson, learn how to solve radical equations with quadratics, and review cubed radicals.

Can’t remember which part is the numerator and which is the denominator? This short lesson will go over the fraction basics you need to succeed!