Desafíos matemáticos

Texas's vast and spectacular landscape has more than 100 national and state parks. From the state's own Grand Canyon, to historic sites and a forest, readers will learn that the state's scenery is much more than the deserts it is so often associated with.

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...

Una maravillosa historia de amor. La vida de Frank Bradley es simple y tranquila. Cinco años después de haber abandonado su trabajo como corredor de bolsa en la Gran Manzana, no se arrepiente de haber elegido comprar un edificio de apartamentos en ese pequeño pueblo costero ni tampoco haber decidido ser el casero del lugar. Aliena Ruslan es una resuelta veterinaria que, a base de esfuerzo y amor por su profesión, y por sus pacientes, ha logrado establecer una clínica de bastante éxito junto con sus socios y mejores amigos. Un vivaz perro callejero hace que los caminos de Frank y Ali se...

Did you know that most animals in the world don't have backbones? Learn more about invertebrates in this engaging, Spanish-translated nonfiction book. Readers will learn all about mollusks, arthropods, arachnids, and crustaceans while being stimulated from cover to cover with its detailed images and charts, intriguing facts, and informative text.