Mezclas y soluciones (Mixtures and Solutions)

Explains, in simple terms, the reasons for skin color, how it is determined by heredity, and how various environmental factors affect it.

What do solar panels, waterproof clothing, and window coverings have in common? They are technologies that have been adapted based on studying butterflies! Learn what scientists have learned from butterflies with this Spanish book that will ignite a curiosity about STEAM topics through real-world examples. Created in collaboration with the Smithsonian Institution, this STEAM book features a hands-on STEAM challenge that is perfect for makerspaces and that guides students step-by-step through the engineering design process. Make STEAM career connections with career advice from actual...

Cuano eran ni�os, Sean Devine, Jimmy Marcus y Dave Boyle eran amigos. Un d�a, un extra�o coche se detuvo en su calle. Uno de los chicos subi� al coche, pero los otros dos no lo hicieron. Y sucedi� algo terrible, algo que acab� con su amistad y que les cambi� a los tres para siempre.Veinticinco a�os m�s tarde, Devine trabaja de detective para el Departamento de Homicidios, Marcus es un ex convicto que tiene una tienda de barrio, y Boyle intenta salvar su matrimonio y mantener sus demonios a raya: demonios que le incitan a hacer cosas terribles.Mystic River ha sido llevada al...

New Edition for Young Adults. Malala Yousafzai is the youngest person ever considered for the Nobel Peace Prize. She stood up to the Taliban and nearly paid with her life. She shares her amazing story in her own words and proves that one person, no matter her age, can change the world.