La vida en un cubo

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.

With exciting, brilliant photography this exciting book discusses how some sharks come from eggs while others do not.

Tailored to the 2013 IB Language B syllabus, our full-colour coursebook, Mañana, contains everything you need to succeed in your two-year Spanish B course. This coursebook prepares students for the 2013 Spanish Language B syllabus (first examination 2015), at both Standard and Higher Level. It is totally international, offering authentic materials from a variety of Spanish-speaking countries. The texts and topics have been chosen because of their intrinsic interest to young people, and to enable students to develop a genuine intercultural understanding. The exercises are carefully designed...

Ofrece un enfoque práctico sobre el funcionamiento y la interrelación de los diferentes elementos que configuran el alemán actual. Los temas se abordan de forma sistemática, con gran variedad de empleos normativos y posibles restricciones. Se proporcionan igualmente las pautas para la formación de palabras, cuestión fundamental en el alemán.