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 3–4. Chemical Tests provides students with an introduction to the world of chemistry. Stories include a peek at the periodic table of the elements and profiles of scientists whose discoveries deepened our knowledge of chemistry. Other stories outline the need for caution in using chemicals, while another describes how chemical tests help detectives track down criminals.

Students will also read about how plants and animals use natural chemicals to protect themselves from predators as well as about how people from prehistoric times to the present have used chemicals in their daily lives.