La resolución de problemas

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

Tommy Fuller and his family help a runaway slave family follow the stars in the Little Bear constellation to freedom.

Teach young students about Susan B. Anthony and her advocacy for women's rights and equality for everyone. This Spanish-translated biography tells early readers about her inspiring life and how she became known as an amazing American. Engaging informational text, with primary source documents and images, keep students reading as they build their literacy skills and social studies content knowledge. Simple text features help students navigate the text.

¿Cómo te va a ayudar esta guía? ERRORES Y HORRORES MAYÚSCULOS es una guía práctica y visual para no cometer las faltas de ortografía más frecuentes y resolver dudas. Y lo conseguirás sin tener que aprender aburridas teorías o complicadas normas. ¿Cómo? Con ejemplos prácticos, rimas pegadizas y trucos infalibles. ¿Qué encontrarás? - Ejemplos claros que se entienden sin necesidad de memorizar reglas. - Trucos fáciles para resolver tus dudas en los casos expuestos, donde se muestran los errores más habituales. - Rimas sencillas de recordar para evitar faltas de ortografía. No...