STC™ Program - Science and Technology Concepts STC BOOKS™ are colorful 64-page readers with research-based science content, giving teachers an ideal way to integrate science instruction during guided, independent, or take-home reading. Teachers use STC™ science curriculum materials to enhance elementary classrooms, increase student test scores, and meet national and state educational standards.

Grades 4-5. Before the microscope was invented in the 1500s, people were unaware of the tiny world of microorganisms that exists all around us-and inside of us. In this book's reading selections, students learn about the microscope, plus they find instructions on how to make a simple microscope of their own. There are enlarged pictures of microscopic creatures-from bacteria to worms-and a story on the role of microorganisms in making flamingos pink. Students learn that microorganisms-harmful and helpful-are an important part of our world.