Matemáticas en Marte (Math on Mars)

The asteroid belt between Mars and Jupiter is an intriguing area of our solar system. Scientists have counted over 670,000 known asteroids there, but there could be millions more not yet found. Readers will discover much more about the asteroid belt in this highinterest book, which blends science and math. They'll read about several topics, such as space missions to the asteroid belt and the difference between an asteroid and a planet, and solve associated math problems-just like actual space scientists do!

The morning of August 24, AD 79, seemed like any other in the Roman city of Pompeii. So no one was prepared when the nearby volcano Mount Vesuvius suddenly erupted, spouting ash that buried the city and its inhabitants. More than 1,700 years later, in 1748, explorers rediscovered the port city with intact buildings and beautiful mosaics. This easy-to-read account is gripping and includes photos of the ruins.

Learn about the history of the Olympic Summer Games! This classroom resource helps students learn about how time and measurement relate to hosting the Olympics. Included in this nonfiction text are mathematical graphs and charts to help students develop content-area literacy in mathematics. This Spanish book includes practice problems, a glossary, an index, engaging images, and easy-to-read text to help students build their math and reading skills.

Think there's just one fairy tale with a beautiful girl and an evil stepmother? Think again! Cultures all around the world have their own Snow White stories. Visit Albania, Germany, Mozambique, and Turkey, and find out who meets 40 dragons instead of "seven dwarfs," and on whose forehead a bright star shines. Fully translated Spanish text.

Un anciano aparece muerto en un granja de la provincia de Lleida, y en un principio todo apunta a que ha sido asesinado. Junto a él se descubren una serie de documentos que permiten sospechar que, en el pasado, la víctima pudo estar relacionada con un agente de la Stasi, la temida policía estatal de la República Democrática Alemana.