Nintendo DS get a A+ with Big Brain Academy.
But this game has everything your ever going to need to get smarter, what ever your best strength is, there is a practice mode where you can, what else practice your skills till you know that you can pass a test, but here is a description of every class.
First off, if its adding numbers is what you like to do, then you would want to play the Compute class, if you want to think what the answer is, then the Think class is for you, if you want to memorize then the Memorize class is for you, if you want to identify shadows of objects, and put puzzles together then Identify class is what you want to play, and if you want to analyze things like drawing a line to one object to another, from what the computer ask, then Analyze class is what you want to play.
It come down to all of those classes, but if you really want to make it fun you should try the Test Mode, after you get your practice in of course, but when you take the test Dr.Lobe puts you in every class with one of the three skills in that class, so don't forget to practice.
OK everyone put their pencils down, time for final say.
All in all this game is fun, and very addictive, so be careful not to work you brain to hard, and I must say with how inexpensive this game is I wouldn't be surprised if five out of every four DS owners own this game it's so much fun.