Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

What is the common good and how does it benefit society? This book looks at the history behind the notion of the common good, touching on ideas from several famous philosophers. Readers will then learn how the common good can be promoted through education and community. Full-color photographs and accessible language help students connect with the text and develop reading comprehension skills. Important elementary subjects from the C3 Framework for Social Studies are discussed in detail throughout this informative book.

Introduces students to the alphabet and letter sounds and helps improve their Spanish-language skills.

Ants are known as one of nature's hardest working animals. Their strength and persistence in bringing food to their colonies have been well documented. Now, beginning readers have a chance to learn about some of the littlest bugs in this volume written just for them. Complete with information about what ants eat, how they live, and generally how they stay so busy, this book is a must-have to satisfy the curiosity of your youngest naturalists. Eye-catching and unique photographs complement the low-ATOS text and aid in comprehension.

I Like to Paint Spanish Edition. When you paint a picture, you can choose the best paint to use. What would you use to paint an elephant? What would you paint with pink or purple?