El paciente cero

Readers will learn about the important relationship between producers and consumers as well as buyers and sellers and how they all work together to create a healthy economy. This instructive volume defines basic economic concepts like goods and services and explains production with examples of the different types of production. It also covers the primary and secondary industries that produce goods. Concepts such as marketing and advertising are also covered, for a well-rounded view of this fascinating aspect of the economy.

¿Sabías que las lombrices viven en la tierra húmeda? Contraen y estiran el cuerpo para moverse. Aprende más datos fascinantes en Las lombrices, uno de los libros de Insectos fascinantes.

Sharing Is Sometimes Hard For Young Students. This Book Talks About Different Things And Ways You Can Share To Get Along Better With Your Classmates And Friends. Complete K-5 Social Skills Collection. Paired With A Fiction Social Skills Title.

An informative and entertaining series presents a combination of facts, fiction, illustrations, puzzles, games, and activities, all designed to introduce young readers to a variety of favorite topics and to help children learn a host of new vocabulary words and amazing facts.