Omar Jayyam

La historia de la ciencia en la Edad Media es, hasta el siglo X, la del mantenimiento precario de los escasos saberes de la Antigüedad clásica que habían sobrevivido en occidente. A partir de entonces, la traducción del árabe de las obras de autores griegos fue la tarea fundamental. En el siglo XIII aparecen los primeros matemáticos medievales realmente creadores - Fibonacci, Jordano Nemorario y Nicolás de Oresme, entre otros. Al estudio de la obra de estos científicos y la de sus precursores está dedicado este libro.

Read Along or Enhanced eBook: From birds to elephants, whales to cats, all animals experience mothering. Beginning readers explore mothers and babies of different animals in this engaging, Spanish-translated nonfiction title. With interesting and informational text, readers will be fascinated!

A trip to Comic-Con becomes an adventure in learning division! Join Zach as he travels to San Diego to attend his very first comic book convention. Along the way, learn about the history of comic books and comic book conventions, and meet the dedicated fans who make Comic-Con one of the most widely attended comic book conventions in the world. This Spanish book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, math charts and diagrams, sidebars, and practice problems make learning division relevant and fun....

You re growing up and your body is changing. If you re a girl, you re likely experiencing the start of menstruation, your breasts are making themselves known, and you re noticing new hair that you might want to be rid of. If you re a boy, you may be experiencing something strange as you sleep, or sweating a lot and not wanting to shower. This book is a complete guide to the terrible and marvelous world of puberty."

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.