La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

¿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...

Each book in this series looks at how to say colours in a different modern foreign language, with each spread within the book covering a different colour. This book looks at the colours in Spanish. Text on each page is in both English and Spanish, and simple, labelled photographs provide additional support. A "dictionary" at the end of each book gives all the words featured in both Spanish and English, and also includes a pronunciation guide.

You've only got one day to spend at the carnival-how do you make the most of your time? Students will learn how to measure time while reading about a fun-filled day at a carnival! This fiction Spanish book uses real-world examples to teach math concepts, and incorporates nonfiction reading to increase vocabulary and comprehension skills. The challenging practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they've learned to their daily lives. Essential text features like a glossary, index, and table of...

Photosynthesis is the basis for all life on Earth! This exciting and sensitive book looks at how plants take a gas that is poisonous to people and animals and, with the help of the Sun, create food and oxygen for all creatures. Children will delight at learning about the little chloroplast factories inside the leaves of plants and become aware of how important plants really are! Children of all ages will love this book!