Charlesbridge Books

Pythagoras and his cousins want to win a music contest, but first they must figure out how to play their instruments in tune, something that's never been done before.



While trying to fix the problem, Pythagoras makes an important discovery--notes that sound pleasant together have a certain mathematical relationship. When Pythagoras applies this ratio to his cousins' pipes and lyres, the result is music to the ears.

It's time to spread out your dominoes and learn how to add! Learning to add is fun when you use dominoes. This bold, colorful counting book shows you how.



First learn how to use simple addition to find the total number of dots, from zero to twelve, on each domino. Then see if you can find the dominoes with each total hidden in the pictures. With a simple but imaginative approach, Lynette Long has created a fun-filled counting book sure to appeal to even the most reluctant math students.

Magic. . .or math?



Enzo is the son of a great magician, however unlike his father, his spells create chaos instead of order. What really interests Enzo, more than books about magic, are books by and about the lives of famous physicists and astronomers like Galileo Galilei and Johannes Kepler. Enzo dreams not of becoming a magician, but a mathematician instead.

Award-winning author Pam Muñoz Ryan celebrates the wonders of her home state. Jaunty poems introduce California's major cities and regions.