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.

En esta historia un niño decide vomitar para no crecer; supone que si no se desarrolla no tendrá que enfrentar la nueva situación familiar. La atención especializada y cuidar de su mascota, una serpiente pitón, le enseñarán que los cambios físicos son necesarios para que todo vaya bien en la vida.

The same fascinating content as Seymour Simon's AMAZING AIRCRAFT, thoughtfully translated into Spanish for use in the classroom or at home. Newly Updated 2012.

One dog in a teacup, two caterpillars on a leaf, three horses having a conversation... Fun photographs and simple text help introduce young readers to counting numbers from zero to ten. A fish-counting activity encourages young readers to practice their counting skills.

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.