La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

Introduces numbers one through nine and provides the reader with the opportunity of counting such things as animals, flowers, balloons, and umbrellas.

SHAAAARRRKK! That's probably the last word anyone wants to hear while swimming in the warm blue sea. But most sharks aren't at all what people expect. In fact, those who think all sharks are giant, man-eating killers are in for a surprise. The compelling narrative, colorful illustrations, and captivating facts in SURPRISING SHARKS reveal that sharks come in all shapes and sizes - and probably should be more afraid of humans than we are of them. Back matter includes a note about sharks and an index.

Fruit is sweet, juicy, and healthy. Learn about how MyPlate helps kids make great food choices every day, including fruit!

Este libro te enseña sobre cómo las presiones de la escuela y las amistades contribuyen a una imagen corporal negativa, especialmente entre los adolescentes. Aprenderás acerca de los trastornos alimenticios más comunes y cómo se tratan.