Teacher's Guide - containing a sequence of about 17 lessons.
	Student Investigations Books - a set of 15 reusable books for grades 3-5.
	Materials - all equipment required for the lessons except a few items commonly found at home or in the classroom.

About STC Secondary™ Unit Kits for Grades 6–10 Science and Technology Concepts Program–Secondary™ (STC Secondary™) is a 16-unit, inquiry-centered middle school science curriculum developed by the National Science Resources Center (NSRC), an organization of the Smithsonian Institution. Each STC Secondary unit provides opportunities for students to experience scientific phenomena firsthand. A comprehensive, research-based curriculum, STC Secondary™ is aligned with the National Science Education Standards (NSES) of the National Research Council (NRC). Each STC Secondary™ unit is based on a four-stage learning cycle that is grounded in educational research and practice: First, students focus on what they already know about a topic. Next, students explore a scientific phenomenon or concept, following a well-structured sequence of classroom investigations. Third, students reflect on their observations, record them in journals, draw conclusions, and share their findings with others. Finally, students apply their learning to real-life situations and to other areas of the curriculum.

STC Secondary™ program builds on the skills and knowledge developed in the STC Elementary™ curriculum, with content balanced among the life sciences, earth sciences, physical sciences, and technology. Each module is developed by teachers, scientists, and evaluators and is field-tested in urban, suburban, and rural classrooms nationwide. The materials are professionally evaluated and reviewed by an advisory panel of teachers, scientists, and science educators before publication.