Cuaderno Ágora de Matemáticas 4

Equality is a contentious issue in our society today. This is why it's important for students to be given information related to equality so they can come to reasonable conclusions of their own. Using age-appropriate language, this book discusses equality in a number of different forms and touches upon why equality is so important in a democracy. The text also explores how extreme equality, like most extremes, could be a bad and unrealistic idea. Readers will gain enough information to understand and think about this complex idea for themselves.

It doesn't take a lot to conserve electricity. Taking action can be as simple as turning off the lights when you leave a room or using "people power" instead of cars to get around. Kids learn this and more about what they can do to help in 10 Things I Can Do to Save Electricity. Now in Spanish.

Planck consideró como tarea científica suprema la búsqueda de las leyes que rigen el absoluto, el invariante oculto en la realidad externa. Le cupo el privilegio de descubrir uno de esos elementos universales: el quantum de acción, la constante h.

"Coleccion de cuentos que suponen un retrato de la cultura indigena, para lo cual el autor tuvo que crerar ambientes, escenarios, situaciones y personajes reconocibles con claridad como parte de la geografia fisica, mitica e ideologica. Clasico de la literatura indigenista. Supersticiones, trato conyugal, tradiciones, religiosidad... el autor nos ofrece estampas increibles y risuenas de estos pueblos acorralados por nuestra civilizacion."