Monkey Tales is a series of educational games by Larian Studios, originally released in 2011 and repackaged together in a Steam release last week. Designed for ages 7 through 11, these games use an algorithm to establish your child's learning curve and ramp difficulty up or down to ensure a well-tailored learning experience.
I happen to have two children in this age range, and Larian Studios was kind enough to offer a review code for the game. My kids, in 2nd and 5th grade, gave the game a whirl and offered their insight on the experience.