Experimentos para niños

This book describes dump trucks called off-highway trucks, explaining their operating equipment and dumping beds, fuel, and jobs.

Presents instructions for a collection of science experiments that demonstrate the principles of electricity and magnetism, including information on batteries, currents, static electricity, compasses, electromagnets, and more.

Isak Dinesen, pseudónimo de la escritora de lenguas danesa e inglesa Karen Blixen, cuya obra está marcada indeleblemente por sus experiencias de casi veinte años en Kenia (1913-1931), donde radicó con su esposo y primo, el barón sueco Bror Von Flixen-Finecke, y sostuvo una relación amorosa con el cazador inglés Denys Finch Hatton. Aunque desde 1907 ya había publicado algunas obras, como La familia Cats (1909) o La venganza de la verdad (1926), el inicio formal de su trayectoria literaria se produjo al volver a su natal Dinamarca, con Siete cuentos góticos (1934), por los que alcanzó ...

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?).