Soy bueno para las matemáticas

Did you know that the first wheel was not invented for transportation or that the system used to create computers was based on the functionality of a sewing machine? In a fun way, this book teaches the history behind inventions that have changed the way we live, from Ancient Mesopotamia to the present. Important details appear at the bottom of each page, including the name of the inventor, the time period, and the place where it occurred.

Y por fin se hizo de noche en nuestra pequeña ciudad. Sus habitantes, también los animales, duermen plácidamente... Aunque no todos, ¡la gran mayoría vive aventuras apasionantes! Hay quien va como todos los años a la Noche de Libros, otros persiguen a un ladrón en medio de la oscuridad o simplemente disfrutan de la fiesta que se celebra en el parque. Rotraut Susanne Berner nos cuenta con sus dibujos todo lo que puede pasar en una pequeña ciudad durante una noche de verano cálida y serena, mientras los murciélagos revolotean en silencio y presenciamos apresuradas correrías nocturnas ...

November 1940. A circus parade walks through the streets of Warsaw, waving a flag and singing. They are 160 Jewish children, forced by the Nazis to leave their beloved orphanage. It's a sad occasion, but led by Doctor Korczak, their inspirational director, the children are defiantly joyful. Their new home is in the ghetto, a prison for Jews. Two years later they board the train that will carry them away to the death camps. Offered his freedom, Doctor Korczak refuses to abandon the children and proudly joins them on their last journey. This profoundly moving illustrated book is based on the...

When many think of the Constitution, they think of the Founding Fathers: Thomas Jefferson, John Adams, Benjamin Franklin...but neither Jefferson nor Adams even signed it. Facts like this will surprise readers, while further information will enlighten them about both the crucial document called the U.S. Constitution as well as about its creation and ratification. This essential volume is a significant addition to any elementary social studies collection.