Experimentos sencillos sobre el tiempo

Esta obra tiene como finalidad permitir al lector la fácil identificación de algunas de las plantas nativas o naturalizadas de las Salinas y Perisalinas del Chaco Árido. Se ha tenido en cuenta que la utilizará público culto, docentes, estudiantes, amantes de la naturaleza, productores, etc., que en general no tiene formación botánica. Es por eso que se ha tratado de evitar los términos técnicos, aunque esto no siempre ha sido posible. Asimismo se consideró que los trabajos botánicos mayormente llevan una cantidad de información solo útil para futuras investigaciones en taxonomía ...

A simple introduction to the work of teachers, including the different types, equipment used, training, daily life, and other aspects of their job.

How much life can one cubic foot hold? Read how photographer David Liittschwager and zoologist Chris Meyer studied life in one cubic foot, and how their findings can teach us about life on the entire planet. Created in collaboration with the Smithsonian Institution, this Spanish 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 that is perfect for use in a makerspace and teaches students every step of the engineering design process....

Many animals live in water, but only some can be defined as fish. Twenty-eight thousand species of fish exist, each with different characteristics. Readers from grades one through four will learn that fish have a distinct impact on their ecosystem and will see how fish survive when well-adapted to an uncompromised environment. Beautiful photographs demonstrate the great diversity of fish and accompany intellectually stimulating explanations of their varying roles and traits. From page to page, what a fish is unfolds in vocabulary call-outs, insightful questions, and relatable...