Las dos verdades

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

El 2 de mayo de 1808 el pueblo de Madrid se levantó contra el ejército de Napoleón. Mientras los madrileños se enfrentaban a los franceses, Goya se dirigía a la escuela de sordomudos para enseñar pintura a los niños. Debido a su sordera no podía escuchar el ruido de los enfrentamientos en las calles de la ciudad. Gracias a la ayuda de Ana, una criada a la que quería retratar, Goya logró ponerse a salvo. Las imágenes de aquella guerra permanecieron en su memoria y años después motivaron sus cuadros. Fernando Marías conmemora el bicentenario de la Guerra de la Independencia con un ...

The US president is the face of the United States to the rest of the world. However, he or she doesn’t have unlimited power within the country. The president has certain powers given by the Constitution, including the ability to make treaties, appoint some important government officials, and veto laws. Readers learn the many duties of the president in simple, clear language appropriate for both younger readers and older readers looking for a succinct review of the topic. Fact boxes supplement the main content with important details about checks and balances, amendments, and more that affect...

Coders are one of the reasons our computers, tablets, and smartphones can do things we couldn't have even imagined just a few years ago. It's no surprise that coders are in high demand right now and that isn't likely to slow down. Readers will learn about the basics of coding and how to turn their creative ideas into reality on the computer screen. They'll also understand why coding will become even more important as technology continues to grow and change. Colorful photographs showing the roles and education of a coder provide readers with an easy way to envision themselves in this...