The Science 4 Teacher’s Edition contains 116 lessons grouped in five units. Each unit consists of two or three interrelated chapters. Most lessons include additional background information, cross-curricular links, and scientific activities. Information for the teacher includes suggestions for teaching the material as a three-quarter year program or as a half-year program. The Teacher’s Edition also includes useful information about science process skills, the management of activities, and grading. Reproducible pages, a materials list, rubrics for assessing Activity and Explorations lessons, and the Science 4 alignment with national standards are located in the back of the Teacher’s Edition. The Teacher’s Toolkit CD is located inside the back cover of the Teacher’s Edition. It includes quizzes, quiz answers, rubrics, a copy of each of the Teacher’s Edition reproducible pages in black and white and color, and useful information about science fairs, all in a printer-friendly format.