Matemáticas en Marte (Math on Mars)

The asteroid belt between Mars and Jupiter is an intriguing area of our solar system. Scientists have counted over 670,000 known asteroids there, but there could be millions more not yet found. Readers will discover much more about the asteroid belt in this highinterest book, which blends science and math. They'll read about several topics, such as space missions to the asteroid belt and the difference between an asteroid and a planet, and solve associated math problems-just like actual space scientists do!

Una reflexión teórico práctica sobre el papel que juegan la Historia de la Ciencia y la Filosofía de la Ciencia, en la enseñanza y aprendizaje de las Ciencias. El autor sostiene que hasta ahora ha predominado en la enseñanza, la adquisición de conocimientos y propone introducir el contexto de descubrimiento como un factor sumamente eficaz el aprendizaje de las ciencias.

A stinky look at the history of personal hygiene reveals fascinating facts, such as the invention of the toilet, how many times Queen Elizabeth I had a bath, how the first sewers were built, and much more.

Memorial Day is an important and special holiday, but some people forget why we celebrate it. On the last Monday of May each year, people around the country gather and remember the men and women who've died while serving in the U.S. military. This educational book encourages readers to reflect on the sacrifices military personnel make to protect our country. This book also touches upon the more lighthearted side of the holiday and the different types of celebrations that people have each year. Featuring full-color photographs and accessible text, this book is sure to engage beginning readers.

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.