Omar Jayyam

Explains the basic science of flight, the problems of getting vehicles into the air, different types of engines, and aircraft design, and includes instructions for making aircraft models.

Kids often play with magnets, yet they don't learn how these playthings work for many years. Practical knowledge from their play can help them learn more about magnetism, and so can this book. Specially written for those with reading challenges or readers looking for a review, the main text covers important vocabulary, magnetic fields, and a discussion of why metals and magnets come together. Diagrams and succinct fact boxes offer additional ways to learn each concept and explain some ideas in greater detail.

Usa las matemáticas: Agrúpalo (Use Math: Group It) builds critical literacy skills with this exciting Spanish-translated nonfiction reader. Engage students with fascinating content that will keep them enthralled from the first page to the last. Focusing on grouping, children will look at similarities to figure out which items should be grouped together. This informational text features simple phrases, exact text-to-image relationships, vivid photographs, and large font to encourage students to make connections on what is the same. Aligned with state standards, Usa las matemáticas:...

Este Diccionario ideológico o ATLAS LÉXICO contiene más de 200.000 voces clasificadas en unos 1.600 campos semánticos. Las palabras aparecen en listados de términos asociados, afines, vecinos o sinónimos que se prestan a la expresión de un concepto. Distingue los usos en función del contexto social (general, coloquial, malsonante, vulgar, ingenio popular y refranes); los dominios geográficos (españoles y americanos); y la actualidad del término (antiguo, desusado y recién incorporado). Además de permitir la consulta del significado de una palabra añade la posibilidad de buscar...