Barcelona XXI siglos

Bridges are a big part of how people get from place to place. But how do they work and how are they built? In this engaging text, readers will explore these important engineering marvels that link places divided by water. Along the way they’ll learn how to build their own model bridge with a step-by-step guide accompanied by full-color photographs of each step. Accessible text illuminates the science behind every span we drive over—and sometimes under!

Introduces the life and times of Underground Railroad and anti-slavery leader Harriet Tubman and explains her place in American history.

Consolidates the Student's Book lessons with targeted practice, unit by unit Additional practice of reading, writing, speaking, listening and use of English skills Extensive grammar and vocabulary practice Complete practice exam in Unit 10 Designed for independent study at home and practice in class Audio for listening lessons available on the Student's App

GOOOLLLLLASSSOOOOO! Prepárate para asistir en primera fila al evento deportivo más visto del planeta: la Copa del Mundo GOOOLLLLLASSSOOOOO! Discover the magic behind the world's most watched sporting event, the World Cup, in this Spanish entry in the WHO HQ series! Cada cuatro años, treinta y dos de los mejores equipos de fútbol masculino de todo el mundo compiten por el título de campeón de la Copa Mundial de la FIFA. Más de mil millones de personas sintonizaron sus TV en todo el mundo para ver el partido final de la competición de 2014, lo que convierte a la Copa del Mundo en el...