Goldstein, Natalie

Explains how early vaccines were discovered, how scientists have used a better understanding of the immune system and antibodies to learn why vaccines work, and how knowledge leads to the development of new preventative measures; and discusses the controversies surrounding the safety of certain vaccines.

Spanish first grade social studies leveled readers. Social Studies Curriculum materials are year long loans to grade level appropriate teachers.

First grade social studies leveled readers. Social Studies Curriculum materials are year long loans to grade level appropriate teachers.

First grade social studies leveled readers. Social Studies Curriculum materials are year long loans to grade level appropriate teachers.

First grade social studies leveled readers. Social Studies Curriculum materials are year long loans to grade level appropriate teachers.

Explores international economic integration, globalization, and free trade in the United States and abroad; and provides related primary source documents and research tools.

This is a study of disease-causing micro-organisms known as viruses, discussing how they function, how the human body fights viruses, and how vaccines are used against viruses.

Explores international economic integration, globalization, and free trade in the United States and abroad; and provides related primary source documents and research tools.

Photographs, illustrations, and diagrams explore the hunting and feeding patterns of certain animals, describing the importance of the food chain.