Recognized as the father of analytic geometry, René Descartes was a French mathematician and philosopher. Kids will love this funny and very accessible tale - based on one of math's greatest myths - about the man who popularized the Cartesion system...
On a beautiful summer day a young girl sets up a lemonade stand and sells enough cups of refreshment to add up to a dollar. Told in rhyme, this delightful story combines the teaching of addition with a traditional rite of childhood entrepreneurshi...
What do you do if you can't sleep? Count sheep! That's what the restless hero of this rollicking tale does. And when sheep don't work, he counts kangaroos by twos and monkeys by threes. But when he gets to bees by fours, the animals run amok! Then it...