¿Cuántos Agujeros Tiene Un Anillo?

Desde el Big Bang hasta tu cumpleaños, y (casi) todo lo demás, este divertido y revelador libro cuenta tu historia. Esta es tu biografía (aunque no lo sepas). Este libro te llevará por un increíble recorrido desde el Big Bang hasta tu nacimiento (¡y en menos de lo que tardas en ponerte los calcetines!). Sus páginas te ayudarán a atravesar océanos de tiempo para ir desde el espacio hasta la puerta de tu casa en una aventura que empieza con un gran BOOM. ¿Te apuntas al viaje de tu vida?

How many elephants? How many giraffes? Count the animals of the Serengeti! Early readers will learn cardinal numbers and counting by fives with this Spanish book for kids. With bright images and simple text, this full-color book develops students' math and reading skills. The Math Talk questions build fluency and comprehension of basic math concepts. Perfect for shared or guided reading, this nonfiction kids book is ideal for kindergarten and ages 4-6.

The Mapuches established themselves in the eleventh century in what is now Argentina and Chile. Their literature is very rich and oral in nature, which highlights the legends that speak of their Gods, beliefs, customs, and stories of their encounters with enemies.

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!