Frog Fractions will not teach you how to fraction. It's also free and you can play it here: http://twinbeard.com/frog-fractions/
It's highly recommended that you play the game before you listen. It should only take about an hour to complete depending on how quick you are at discovering its tricks.
Outro music: Dance Dance Revolution Extreme 'Epic Steps' by Tonalysis (http://ocremix.org/remix/OCR03699)
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