El sistema óseo (The Skeletal System)

Discusses issues that involve dating and premarital sex among young adults and explores the consequences of making bad choices when it comes to promiscuity.

Animals sing or talk to communicate. They make noise for different reasons. Find out why some animals make certain noises. Paired to the fiction title So Many Classes.

Each book in this series looks at how to say colours in a different modern foreign language, with each spread within the book covering a different colour. This book looks at the colours in Spanish. Text on each page is in both English and Spanish, and simple, labelled photographs provide additional support. A "dictionary" at the end of each book gives all the words featured in both Spanish and English, and also includes a pronunciation guide.

A scientific look at how clouds are formed, why there are different types, and what you can tell about a cloud by looking at it.