Un polizón en la maleta

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...

Más de 150 fotos de animalitos acompañadas de textos sencillos que te descubrirán todos los misterios de la vida silvestre.

Estudio completo y actualizado de la Geografía española, planteado con un carácter eminentemente práctico para que los alumnos puedan superar con éxito las pruebas de acceso a la Universidad (PAU).

Presents pairs of photographs of similar items, including a hot dog and an ice cream cone, and the sun and the sea, to introduce the difference between hot and cold.