Yo pido disculpas (I Say I'm Sorry)

What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these fundamental concepts, discover how you work, and how simple machines make doing work easier.

Many children have heard of dams, but not many know what they are. This book engages young readers as it reveals the many fascinating aspects of the worlds largest dam, which was built on the border of Paraguay and Brazil.

Chronicles The Acquisition And Settlement Of The Various Territories That Have Not Become States But Are Governed By The United States.

A biography telling the life story of Booker T. Washington, along with his accomplishments toward promoting the education of African Americans. Written in graphic-novel format.