STC Literacy Series™ Developed by the NSRC to meet the needs of the early elementary inquiry student, STC Literacy Series™ for grades K-2 STC® units balance the needs of emerging readers with your state's content standards. Content is presented in a colorful, engaging, and age-appropriate manner ideal for your reading time. Key features include: Strong text-picture match Vocabulary in context Fun facts In-depth questions Photo glossary Colorful STC® reading guide

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.