Conservación de la masa (Conservation of Mass)

Light can travel faster than anything else in the universe. But what exactly is light, and where does it come from? This nonfiction Spanish book teaches students all about light, and introduces them to important scientific concepts and vocabulary terms like infrared, ultraviolet, photos, and visible spectrum. The intriguing images, detailed diagrams, and stimulating sidebars will keep students connected to the text. The fun lab activity provides a real-world learning experience that supports STEM instruction. Aligned to state and national standards, the leveled text supports differentiation....

¿Chocolate o vainilla? ¿Dulce o salado? ¿Gatos o perros? Cuando de ciertos temas se trata, todo niño tiene sus preferencias. Desde que existen las mascotas, el debate entre tener un gato y tener un perro ha sonado fuerte durante los recreos y almuerzos en todos los colegios del mundo. ¿Cuál es mejor? ¿Cuál es más inteligente? Este libro presenta los hechos de manera divertida e informativa. A los niños les encantará leer este texto de Nivel 3 para decidir cuál es la respuesta a la pregunta eterna - ¿gatos o perros? NationalGeographic apoya a los educadores K-12 con Recursos del...

Following on the outrageous success of Innosanto Nagara’s A is for Activist (now in its fourth printing), A de Activista is a Spanish-language ABC board book written by Grammy Award-winning lyricist and singer Martha Gonzalez and illustrated by Nagara for the next generation of progressives: families who want their kids to grow up in a space that is unapologetic about activism, environmental justice, civil rights, LGBTQ rights, and everything else that activists believe in and fight for. The alliteration, rhyming, and vibrant illustrations make the book exciting for children, calling them...

Winner of: International Latino Book Awards 2014, Primer Premio en la categoría Best Young Adult Non-Fiction Book Focusing on key figures from the worlds of art, literature, music, politics, and science, this collection introduces young readers to luminaries who, despite the difficulties and failures of their childhoods, went on to accomplish great things. Readers will discover what individuals such as Jane Austen, Thomas Edison, Albert Einstein, Mohandas Gandhi, John Lennon, Pablo Picasso, and even the author himself were like as children and young adults, and draw inspiration from their...

Sesenta autores, desde catedráticos de universidad hasta estudiantes de Secundaria y Bachillerato, nos presentan los cuarenta desafíos que la Real Sociedad Matemática Española propuso con motivo de su centenario.Son cuarenta estimulantes retos que avivan el ingenio. Enfrentándose a ellos, el lector se sentirá un auténtico investigador matemático.Pero no hay que asustarse. No es necesario saber muchas matemáticas. La herramienta esencial para resolver los desafíos es pensar ordenadamente.