El ciclo del nitrógeno (The Nitrogen Cycle)

Learn about the history of the Olympic Summer Games! This classroom resource helps students learn about how time and measurement relate to hosting the Olympics. Included in this nonfiction text are mathematical graphs and charts to help students develop content-area literacy in mathematics. This Spanish book includes practice problems, a glossary, an index, engaging images, and easy-to-read text to help students build their math and reading skills.

In an entertaining way, shows how to add, subtract, multiply, and do long division without a calculator.

Did you know that the first wheel was not invented for transportation or that the system used to create computers was based on the functionality of a sewing machine? In a fun way, this book teaches the history behind inventions that have changed the way we live, from Ancient Mesopotamia to the present. Important details appear at the bottom of each page, including the name of the inventor, the time period, and the place where it occurred.

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.