26 Problemas resueltos de navegación astronómica para capitanes de yate

Mathematics constitutes ideal material for exercising the art of learning and thinking. For this it is necessary that the classroom has a stimulating atmosphere which requires determined attitudes and beliefs. The book combines theory and practice and responds to questions such as these: to think in the mathematics class? on what does the knowledge of solving problems really consist of? what are the beliefs and which are the most common ones among the students? how to diagnose, evaluate and, in some cases to modify, the systems of beliefs of the pupil?).

Set in the 1950s in the Bronx, this is the story of a girl with a dream. Emmy award-winning actress and writer Sonia Manzano plunges us into the daily lives of a Latino family that is loving--and troubled. She is a child living amidst the squalor of a boisterous home that is filled with noisy relatives and neighbors. Each day she is glued to the TV screen that blots out the painful realities of her existence and also illuminates the possibilities that lie ahead. But--click!--when the TV goes off, Sonia is taken back to real-life--the cramped, colorful world of her neighborhood and an...

¿Qué hizo que una familia latinoamericana abandonara su tierra natal para partir con sus tres hijos, de diez, trece y quince años, a tierras del continente africano? Siga las peripecias y aventuras de la familia Jacobi Mangold durante quince años de servicio misionero en el Hospital de Leprosos de Masanga, Sierra Leona; el Hospital Scheer Memorial en Nepal, al norte de la India; y el Hospital Misionero de Yuka, Zambia. Comparta su período de adaptación a una vida sin electricidad, televisión ni otras comodidades básicas, y su angustia al sufrir un ataque al hospital por fuerzas...

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.