La historia del fuego

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...

No town or city could be built if the builders didn't understand the concepts of perimeter and area. Students will use perimeter and area to build towns and cities and design homes and parks in the book, Pueblos y ciudades (Towns and Cities). At home or in the classroom, this nonfiction book will engage students in learning measurement and geometry, and how to grid patterns, through fun practice problems and diagrams.

París. Año mil cuatrocientos. Robin, un muchacho, pasa a formar parte de una banda de maleantes que planea el robo del Santo Grial. El chico no se imagina que esta será la gran aventura que cambiará totalmente el curso de su vida. ¿Adónde le conducirá este apasionante peregrinaje? Una novela de aventuras en la que se muestra la necesidad de honestidad y ética.

"In this title, children explore the reasons why they may feel embarrassed, how to recognize feelings of embarrassment, and appropriate action to take when they feel embarrassed."