How Do You Measure Time?

Provides an overview of the design, uses, weapons, and equipment of U.S. Navy submarines. Written in English and Spanish.

Michelangelo, the world-renowned artist who painted the Sistine Chapel's frescoes and sculpted Moses, David, and the Pieta, is the subject of this beautifully written historical novel. Text copyright 2004 Lectorum Publications, Inc.

Everyone has heard of Albert Einstein--but what exactly did he do? How much do kids really know about Albert Einstein besides the funny hair and genius label? For instance, do they know that he was expelled from school as a kid? Finally, here's the story of Albert Einstein's life, told in a fun, engaging way that clearly explores the world he lived in and changed.

Introduce students to one of the greatest presidents in American history, Abraham Lincoln. In this engaging and informational Spanish-translated biography, readers will learn about the amazing things that Lincoln accomplished during his presidency, and why he is considered a hero today. Build reading skills and strengthen social studies knowledge with this engaging book!

Con más de 100 juegos mentales para hacer a contrarreloj, este libro es la mejor forma de ejercitar tu mente. Encontrarás sudokus, laberintos, escaleras de palabras, batallas navales, buscaminas y desafíos de memoria. ¡Es la hora de poner a prueba tu cerebro!.