Free tutorials cover statistics, probability, and matrix algebra. Strong focus on AP statistics. Written and video lessons. Online calculators.
"Thank you and thank you again for providing a complete, well-structured, and easy-to-understand online resource. Every other website or snobbish research paper has not deigned to explain things in words consisting of less than four syllables.
★★★★½ "Of all the many educational apps on Google Play, this is one of the best." - CNET Imagine if learning anything was as effortless as breathing. Introducing Semper. Every time you open your favorite apps, you get a short language, math or knowledge puzzle to solve!
College level intro to statistics class online. Learn about the different methods to describe data and run statistical analysis.
The best collection of free online flash games from around the Internet.
View Moments: The Best Of Twitter At A Glance Moments: The Best Of Twitter At A Glance Moments is Twitter's new (though not especially groundbreaking) feature that will give you a snapshot of what's happening on Twitter (that is, the world) at that exact... well, moment.
Fraction calculator with step-by-step operations and algebra.
There are a lot of games on the Android. Not all of them are worth a download, but you'll find enough of them to waste a few months of your time. If you're going to spend your time gaming, why not invest in something useful? By playing brain teasers and riddles, you can train your...
User submitted and ranked brain teasers, riddles, quizzes, trivia, logic problems and mind puzzles. Free online games and message boards.
Play With Your Mind features over 100 original mind games, brain puzzles, brain teasers and IQ tests. If you haven't yet heard, playing brain games exercises your cognitive abilities and improves your brain fitness . So take some time to explore around, play some games, have some fun ...