The Math Teacher

YouTube es la herramienta de autopromoción más poderosa que existe hoy en día. Te contamos cómo nació y cómo funciona, y los grandes fenómenos que ha generado (Harlem Shake, lipdubs...). Te presentamos a los grandes cracks de YouTube, especialmente vloggers y músicos, que han logrado el éxito con sus vídeos. Pero, sobre todo, te explicamos todo lo que tienes que hacer para triunfar en YouTube, tanto si quieres publicitar tu negocio como si lo que buscas es la fama. Te lo explicamos todo, hasta cuál es la mejor hora para colgar un vídeo.

What’s the difference between a seal and a sea lion? These “second cousins” of the sea look similar, but there are many ways to tell these creatures apart. From ear shape to the noises they make to communicate, seals and sea lions are amazing creatures with both shared features and many truly unique attributes. They both share an ocean habitat, but when readers take a closer look, it’s easy to discover how they each fight off predators, mate, and raise their young in different ways. Captivating full-color photographs help to bring these marvelous mammals to vivid life.

This book introduces the reader to the nighttime world of the rat, including its habitat, activities, diet, and the unique things that it does.

Children are encouraged to celebrate and appreciate both their own and other people's differences and shows how, when people of different races and ethic backgrounds come together, they make a beautiful rainbow.