Construir faros: Read-Along eBook

Explains what mathematics is and how it feels to do math, and shows some basic mathematical concepts such as sorting and measuring.

The plot of The Empty Region takes the reader from the military camps of holy warriors in Pakistan, to the security corridors of the CIA and the FBI. It’s a fascinating puzzle inhabited by historical characters, including Osama bin Laden and George W. Bush, as well as officials aware of the tragedy´s secrets. Szichman leads us along the terminals where the air pirates of al-Qaida consummated their tragic ritual, makes us travel on the airplanes, turned into guided missiles, and recreates the 102 minutes when the burning towers of the World Trade Center became hell on earth. Although...

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.

Engage readers' interests and imagination. These award-winning biographies feature the breathtaking, illustrations for which the On My Own books are known. Written in story format, each book features pivotal episodes that reveal what kind of person the subject is (or was) and how he or she came to be famous.