Tigre dientes de sable (Smilodon)

Young readers will discover amazing facts about birds' nest-building habits and other information with this new guide featuring Internet links to each of the book's topics.

Why do continents matter? From economics to weather science—and everything in between—knowing the characteristics of the continents expands readers’ perspectives in every school subject. This fundamental information is a building block of many future lessons and an essential part of elementary education. This book presents a focused, clear, age-appropriate look at Earth’s continents that young readers are sure to find both informative and interesting. This volume is also packed with colorful maps that are labeled and explained to foster young readers’ comprehension of this important...

Beautiful full-color photographs and informative text, in both English and standard Latin-American Spanish, introduce readers to our Moon. They will learn about the Moon’s phases, that people have been to the Moon, and many more exciting facts. This is a great addition to any aspiring astronomer’s library.

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.