Los estados de la materia — Los gases

Did you know that pigs are some of the smartest animals on Earth? Pigs keep themselves very clean. Discover more about these farm animals in My Pig.

Did you know that liquids take the shape of their containers? If liquids get hot, they can become gases. Discover more interesting facts in Liquids, part of the States of Matter series of EYEDISCOVER books.

Did you know that baby butterflies look like worms with legs? Caterpillars turn into butterflies inside a shell. Discover more about these flying insects in Butterflies, part of the Life Cycles series of EYEDISCOVER books.

Spanish speakers can now learn more about the most famous championship series in all of baseball: the World Series! Los hispanohablantes pueden ahora conocer más sobre la serie más famosa del campeonato de béisbol: ¡la Serie Mundial! "Strike three, you're out!" "He's safe!" "Home run!" Every October, millions of baseball fans around the country anxiously wait to see which team wins baseball's biggest championship. But the original games of the 1900s hardly looked like they do today. Take a look back over one hundred years and discover the history of baseball's greatest series. With...

Presents a line-by-line explanation of the entire United States Constitution, in English and Spanish. Provides a Spanish translation of the Constitution, historical context and student exercises that approximate the decisions made by the Constitution's authors. Written at the fifth grade level.

Estructurado en doce unidades; Enfoque comunicativo; Estudio inductivo de la gramática; Resumen nocio-funcional.

Readers are introduced to some of the most well-known criminals and tyrants of the past in this exciting nonfiction reader. Featuring intriguing facts and theories, colorful images, and informational text in conjunction with a glossary of terms, a bibliography, and a list of helpful websites with more information, this text will make readers want to learn all they can about ancient history and the bad guys and gals from the past. This book has been translated into Spanish.