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Introduction to Mathematical Thinking

$49.00

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

$30.00

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...