This batch of the week's best iPad apps is all about learning. Whether it's U.S. presidents, or human anatomy, you're beefing up your brain muscle.
America's Presidents: The Smithsonian National Portrait Gallery combines art, history, and one of my personal favourite topics -- US presidents. Learn all about the 43 commanders-in-chief, and see their iconic pictures, which hang in the DC museum. $5.49
Essential Anatomy: Here's a great way to use the iPad's retina display -- look at human anatomy in 3D. In this iPad app, you can view all 6 systems of the body in intense details. $31.99
Sound Uncovered: Why does the sound of a car door make you want to buy one vehicle over another? This app -- new from the San Francisco Exploritorium -- lets you play with sound in a very unconventional, game-like way, in order to understand the every day noises around us. Free