Experimentos sencillos con la naturaleza

There is a bright light in the night sky. Sometimes it is round like a ball, sometimes it is a crescent, and sometimes it is not there at all! What is this strange and changing thing? It is the moon, of course! Read all about our moon and the moons surrounding other planets in this Spanish-translated book.

Hamburg, 1947, a headless body is found in the ruins of a bombed out building. No evidence or identifying clues are left behind. Inspector Frank Stave, a man traumatized by the war, does not have high hopes of solving this case. When another victim is located, Stave knows he has a serial killer on his hands. The investigation that he launches puts his personal safety at risk.

La comprensión, aprendizaje y aplicación de las Ciencias Experimentales, especialmente las destinadas al estudio de la Física y la Química, requieren una dedicación muy personal a la resolución de cuestiones y ejercicios que motiven el interés hacia estas materias. Este libro presta una ayuda complementaria a las explicaciones del libro de texto y de la clase. Ofrece, para cada Unidad, un resumen de los conceptos, unidades y fórmulas más importantes, así como un buen número de cuestiones, ejercicios y problemas explicados y resueltos, todo ello con el fin de afianzar y ampliar los...

You've only got one day to spend at the carnival-how do you make the most of your time? Students will learn how to measure time while reading about a fun-filled day at a carnival! This fiction Spanish book uses real-world examples to teach math concepts, and incorporates nonfiction reading to increase vocabulary and comprehension skills. The challenging practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they've learned to their daily lives. Essential text features like a glossary, index, and table of...