Here's a list of websites that will actually make you smarter:

CodeAcademy — Learn programming languages like HTML, CSS, and Javascript with this free, interactive resource. 

Coursera — With more than 800 free courses on topics that range from internet history to financial engineering, the education platform helps you deepen your knowledge across a range of subjects.

Digital Photography School — Read through this goldmine of articles to improve your photography skills; they're helpful even if you're a complete beginner. There's also an active forum where you can find a community of other photographers to connect with.

Duolingo — Sharpen your language skills with this fun, addictive game. It's a college-quality education without the price tag. If you're looking for more free language-learning materials, you can also try BBC Languages.

edX — From classes like The Science of Happiness to Responsible Innovation, edX offers tons of MOOCs from many of the world's top universities.

Factsie — Did you know the horned lizard can shoot blood out of its tear ducts? Keep clicking through this site to find unusual historical and scientific facts, along with links to sources. Another great site for fun facts is Today I Found Out.

Fast Company's 30-Second MBA — In short video clips from from accomplished corporate executives, you'll learn great business advice and life lessons, really fast.