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 Challenge
 Pythagorean Triple:  A set of three non-zero whole numbers, a, b, and c, such that a2 + b2 = c2.

Interactive Pythagoras: Use the concept of area to "prove" the Pythagorean Theorem.

Squaring with Squares: Draw area connections to the Pythagorean Theorem.

Difference of Squares: Find positive integers which can be written as sum or difference of squares.

As the Crow Travels: Can you devise a strategy that you travel in a car exactly twice the distance as a crow flies, but end up at the same spot?