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Interact with 3-D chemical compounds, advanced concepts.
Devices: iPhone, iPod Touch, iPad, Android, Windows Phone
Speedy, amusing games sharpen speed but not grammar skills.
Devices: iPhone, iPod Touch, iPad, Android
Find scholarships, preview essays with targeted search tool.
Devices: iPhone, iPod Touch, iPad, Android, Fire phone, Kindle Fire
Tricky user interface, iffy content in unpolished tool.
Devices: Android, Kindle Fire