La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

A dictionary tailored for the Latin American market is an ideal supplement to the middle school curriculum and includes up-to-date definitions, example sentences, synonyms and antonyms, and more. Original.

Introduces the concept of opposites through pictures of a girl named Laura as she takes part in common daily activities.

"Este poema es en realidad un cuento, una excusa, un invento para estar contigo, abrazarte, y detener el tiempo." Un poema para mis abuelos es un trozo de tiempo del que nunca puedes arrepentirte. Unas páginas para entender que el corazón de nuestros abuelos es el lugar más bonito y seguro donde ir a jugar y aprender.

How do you get from place to place every day? Well, believe it or not, people travel in all sorts of ways. From bikes, cars, subways, escalators, and even on animals and tramways, transportation around the world all depends on where you live and where you need to go. Get ready to learn the fascinating ways kids around the globe stay moving! This title will allow students to ask and answer such questions as who, what, where, when, why, and how to demonstrate understanding of key details in a text. • Text based questions • Bold keywords with picture glossary • Multicultural • World map