The winner is number 3- Elisa!
All of my children have enjoyed this book. It tells the story of Pythagoras as he discovers his famous theorem. This is a great introduction to geometry. If a child knows the story behind a formula, he is much more likely to understand it, giving him a better grasp of the formula and the theorem.
I am giving away one copy of What's Your Angle, Pythagoras? A Math Adventure. If you would like to win, please leave a comment. This giveaway will end 2-27-2010
Don't forget to enter the other giveaways in honor of World Maths Day!