This is taking a much more traditional route to brain fitness but, unless you're a true genius, Khan Academy's app will likely give your mind plenty new and difficult concepts with which to grow. Khan Academy's mission is to provide a free, world-class education to everyone. This app helps their cause by letting users access the Academy's complete library of over 4,200 educational videos and articles. Want to re-learn calculus? Here's your chance. [free; iOS, Windows]
Powered By ZergNet
Action-Packed Summer Trips
Race Dune Buggies, Explore Italy, Bike Yellowstone
Plus: Fighting Poachers and Oil Companies in Congo
ON NEWSSTANDS NOW
Nick Offerman's Life Advice
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.