Nathan Hale

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?).

Provides information on the tiny reptiles, including their use of color as a defense, their climbing skills, and their ability to grow back a missing tail.

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

Ariadna tiene el corazón dividido: como un fuego se ha encendido su amor por Teseo, el joven llegado desde Atenas para matar al Minotauro o morir en el Laberinto. ¿Qué debe hacer? ¿Debe dejar que Teseo se pierda para siempre en el palacio de los cien intrincados pasillos? ¿O bien debe ayudarlo a matar a su hermano y luego huir con él de la cruel Creta? Pero, ¿pueden realmente decidir los hombres o son los dioses quienes tejen el frágil hilo de su destino?