Beautiful astronomy resource is rich with information.
Terrific tool for learning speedy math tricks.
One of the best tower-defense games gets even better.
6 fun ways to practice; purchase needed to unlock full app.
Illuminating look at expressions you're using incorrectly.
In-app pushiness mars otherwise fun strategy game.
Easier to use, more fun than similar apps, but not as fancy.
Free practice tool is good but has incomplete word list.
Feature-rich iPad version of the Mac music sequencer.
Pricey RPG delivers polish and depth of video game series.
Fantastic version of board classic with lots of tools.
Tweens experience high school in an age-appropriate way.