¿Caimán o cocodrilo? (Alligator or Crocodile?)

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.

Learn multiplication on a fun-filled trip to the supermarket! The displays, shelves, and layout of a local grocery store provide ample opportunities for students to learn multiplication as they are engaged in reading high-interest content. This Spanish book combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. The full-color images, math graphs and charts, and practice problems make learning math easy and fun. The table of contents, glossary, and index will further understanding of math and reading...

When President Thomas Jefferson bought the Louisiana Territory from cash-strapped France in 1803, he doubled the size of the United States without really knowing what he was getting. He dispatched Meriwether Lewis and William Clark and their Corps of Discovery to explore a territory that would include part or all of fifteen future states and to seek a water route to the West Coast. Westward expansion began immediately, all for the bargain price of 15 million dollars. This book richly explores this fascinating part of history.

¿Cómo pueden tener el mismo sueño cuatro personas? ¿Por qué iban a suicidarse después de soñarlo? John Verdon, la gran sensación del thriller a escala internacional, ha vuelto con un nuevo libro que recordará a sus seguidores el ritmo cinematográfico de su escalofriante novela debut Sé lo que estás pensando .Cuatro personas que no se han visto nunca, que viven en distintas partes del país y que no parecen tener nada en común explican que han tenido el mismo sueño: una pesadilla recurrente cuyo elemento más inquietante es un cuchillo ensangrentado con la cabeza tallada de un...