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Get On A Covered Wagon And Explore Everything About Pioneers With This Book. From What They Ate, Wore, Who They Encountered And Where They Traveled. Text Boxes Filled With Pioneer Facts Add Additional Information On The Pioneers Difficult Journeys To Unknown Lands.

¡Imagina ver a cientos de animales de la misma especie en un mismo lugar a un mismo tiempo! Aquí en Norte América, muchos animales se agrupan en grandes masas en tiempos y lugares previsibles. No todas las migraciones están ligadas a cambios de fuentes de alimento - algunas están ligadas a los cambios de ciclos de vida. Ciertas aves, reptiles, mamíferos, anfibios, peces e inclusive insectos, emigran durante la primavera, el verano, el otoño o el invierno. Viaja junto con ellos mientras aprendes qué es lo que hace que estos animales estén Avanzando...de aquí para allá.

This Spanish-language series presents the complete range of math concepts and skills students are expected to master during the first grade. The series moves sequentially, from easiest to hardest concepts, with each book covering a different math topic. The first volume reviews the math concepts students learned in kindergarten. The next six books cover counting, adding and subtracting, tables and graphs, money, patterns, and measuring. The eighth volume is a summary of the math concepts students have studied throughout the year. Each book presents situations that show the relevance of math...

Introduces readers to amphibians and the concept of classes of animals. Simple text describes the common features and behaviors of amphibians as well as offering many examples of creatures in this group.