El fantasma negro

Combine valuable fourth grade math and literacy skills in a purposeful way with the Spanish-translated math reader Viajes: Por tierra, aire y mar (Journeys: Land, Air, Sea). Focusing on the critical skills that 4th graders need to know to advance to the next level, this book incorporates key math concepts into an engaging text that introduces students to different types of maps, including street maps to moon maps. Students will identify map symbols, keys, compasses, grid coordinates, and map ratios. Filled with mathematical charts, diagrams, and practice problems, the text features in this...

Las frases quedan colgadas en el tiempo, creadas por hombres que se equivocaron en lo que enseñan en ellas. Eres lo que puedes ser capaz de creer; que cada buen proverbio que exista sea tu mentor, tu ley, tu concepto y así serás infalible ante cualquier circunstancia, porque el verdadero poder está en el conocimiento de reconocer en lo que todos fallamos. El error más grande es no aprender de los errores, pues quien no aprende de ellos esta condenado a seguir repitiéndolos. Cuando una frase es parte de tu vida diaria, como guía, se volverá religión para ti, y así te convertirás en...

When the Louisiana Territory was added to the United States in 1803, it about doubled the size of the young nation. It took years to clarify its boundaries and explore every square mile. How this momentous purchase came to be and its implications on the future of the United States are explained in detail in this book. Uncomplicated maps and simple language help developing readers and those in need of review to understand the many changes in this land that started with its purchase in 1803.

Plants are living things that grow and change. Over time, plants have made remarkable adaptations to suit the habitats in which they live. Simple text and beautiful images highlight how plants have adapted to life in the Arctic, in aquatic environments, and in other habitats such as those in deserts and grasslands.