¿Qué hace a una familia?

Animals sing or talk to communicate. They make noise for different reasons. Find out why some animals make certain noises. Paired to the fiction title So Many Classes.

The first Thanksgiving was a celebration. The pilgrims were thankful for the harvest they planted. Find out what the pilgrims ate for the first Thanksgiving. Paired to the fiction title A Year of Fun.

Animals do not brush their teeth, but they still have ways to keep their teeth clean. Read to find out how. Paired to the fiction title Going to the Zoo.

Libro para adquirir el fundamento de los mecanismos teórico-prácticos de los equilibrios químicos que tienen lugar en disoluciones acuosas. Se inicia con una presentación de los compuestos químicos, de las reacciones químicas y las ecuaciones químicas con los conceptos estequiométricos necesarios para exponer la disociación electrolítica, sus consecuencias y las diversas formas químicas de cuantificar los compuestos en estado puro y en disolución, teniendo en cuenta su disociación y con la utilización de cifras significativas, explicando una estadística básica para la...

As a land that’s constantly in flux, Earth sometimes reveals clues about the plants, animals, and other organisms that lived long ago. Fossils teach us much about what life was like millions of years ago, answering the questions of how Earth changed and maybe even why it changed. This essential Earth science topic is thoroughly explained through manageable text, fact boxes, informational charts and diagrams, and a glossary and index. Readers will become young Earth detectives by the time they’re through with this text!

¡La Dra. Vitamina siempre vive en la cocina, nunca pisa el hospital! Ven a conocer a la Dra. Vitamina, una superheroina que tiene muchas formas y está escondida en casi todos los alimentos que tomamos. Sí, en casi todos menos en esos que en realidad no son alimentos. Una historia divertida y llena de aprendizajes para que los más peques comprendan que su cuerpo es su mejor aliado y que tenemos que cuidarlo para que funcione muy bien y durante muuuuucho tiempo.

English File's unique, lively and enjoyable lessons are renowned for getting students talking. English File fourth edition has built on tried and trusted methodology and contains uniquely motivating lessons and activities that encourage students to discuss topics with confidence. The English File fourth edition Student's Book is packed full of interesting content to keep students of all abilities fully engaged and motivated. The English File fourth edition Workbook reinforces what is learned in each English File lesson, and can be used as extra practice during class, or set as homework. This...