CIRCUITOS Y CORTOCIRCUITOS

Read about the powerful rattlesnake and how its tail rattles to warn predators to stay away or risk a venomous bite. Amazing photos and simple text make this book a great high-interest read.

As a young boy, Jos Marti he traveled to the countryside of Cuba and fell in love with the natural beauty of the land. During this trip he also witnessed the cruelties of slavery on sugar plantations. From that moment, Mart began to fight for the abolishment of slavery and for Cuban independence from Spain through his writing. By age seventeen, he was declared an enemy of Spain and was forced to leave his beloved island. Marti traveled the world and eventually settled in New York City. But the longer he stayed away from his homeland, the sicker and weaker he became. On doctor's orders he...

Material para el alumno que sirve de apoyo al libro del alumno, para afianzar los conocimientos adquiridos en dicho libro. Ofrece una serie variada de ejercicios de refuerzo.

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.