Matemáticas en el cinturón de asteroides (Math in the Asteroid Belt)

Simple text and photographs introduce the animals of the Arctic, grouped to provide practice in solving easy addition problems.

Mrs. Frizzle's class investigates the disappearance of the salmon from the sea and in the process learn about migration.

Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!

Método de español destinado a estudiantes jóvenes y adultos.Nivel A2 del MCER. Versión renovada completamente de un clásico de nuestro catálogo, ahora en 5 niveles. Adaptado a las directrices del Plan Curricular del Instituto Cervantes. Consta de 9 unidades y tres repasos. Incluye Lecturas extra, modelo de examen nivel A2, apéndice gramatical, glosario y la transcripción de las audiciones. Incluye un CD para trabajar la destreza oral.En relación con la edición anterior, la nueva edición se presenta en un formato mayor, con mayor número de ilustraciones y un aumento del número de...