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Introduction to Mathematical Thinking


Learn how to think the way mathematicians do - a powerful cognitive process developed over thousands of years. read more...

Learn Arabic: Your Online Arabic Course

$149.95 $99.95

This course takes you from total newbie to speaking proficient Arabic. You'll be conversing with Arabic speakers in no time. read more...

Think Again 1: How to Understand Arguments


You will learn simple but vital rules to follow in thinking about any topic at all and common and tempting mistakes to avoid in reasoning. read more...