La optimización mecánica en el medio acuático

In this poetic memoir, which won the Pura Belpré Author Award and was named a Walter Dean Myers Award Honoree, acclaimed author Margarita Engle tells of growing up as a child of two cultures during the Cold War. En este poético libro de memorias—ganador del premio Pura Belpré de autor, finalista del premio de YALSA de no ficción y premio de honor Walter Dean Myers—la aclamada autora Margarita Engle recrea su infancia, que transcurrió a caballo entre dos culturas durante la Guerra Fría. Margarita is a girl from two worlds. Her heart lies in Cuba, her mother’s tropical island...

The varied projects in this volume present readers with more than a dozen lenses through which to learn about the progress and impact of the Industrial Revolution, and the tide of industrialization it unleashed, in the United States. Broad questions prompt readers to engage with major themes in civics, geography, economics, and history. A wealth of background information helps readers understand how these themes play out in the context of the profound shifts in the American economy and society that took place in the nineteenth and early twentieth centuries.

This historical novel will fascinate young readers as they learn about Mayan customs and lifestyle. A glossary of Mayan terms and authentic drawings will help children understand this highly advanced culture. Text copyright 2004 Lectorum Publications, Inc.

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...