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

Todo el mundo ama a los pandas. Nos encanta verlos jugar, trepar, dormir y masticar. ¡Pero cuidado, también rasguñan—mira ese árbol! Ilustrado con maravillosas imágenes que registran el lugar único de este animal en China y en todo el mundo, este libro en español es para niños de Nivel 2 que leen solos o con ayuda de vez en cuando.

In Showing Kindness, beginning readers will learn about all the ways they can be kind and considerate in their daily lives. Vibrant, full-color photos and carefully leveled text engage young readers as they discover how they can build character by showing kindness.

Two books in one, this oversized volume shows readers the plants, root systems, insects, fossils, animals, mines, gems, minerals, and man-made wonders such as tunnels, subways, submarines, pipes, cables, and power lines that can be found underground or underwater in an unforgettable visual way. Each page takes you deeper and deeper under the waves or through layers of earth.

Do you know why there are thirteen stripes and fifty stars on the American flag? Or how the American flag inspired Francis Scott Key to write "The Star Spangled Banner?" Find out the answers to these questions and more in The American Flag.