Experimentos sencillos sobre el espacio y el vuelo

Gretchen es una chica de catorce años. Ella y su familia, los Sackmeier, son conocidos en el vecindario como los “Cinco Sacos”. Todo empieza a cambiar cuando su madre, Elisabeth, se rebela y decide darse una oportunidad como mujer: se pone a trabajar con el deseo de poder retomar los estudios y convertirse en asistenta social, además, se pone a dieta para mejorar su imagen y crecer en autoestima. Su marido no ve con buenos ojos tanto cambio. Esta nueva situación coincide con la etapa convulsa de la adolescencia de Gretchen.

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

Introduce students to capital resources and how they work as part of our economy. This Spanish-translated text will teach young readers about the economy, while building their literacy skills and social studies content knowledge. Simple informational text features help students navigate the text, while primary source documents and images keep students engaged.

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...