The Science 3 Teacher's Edition, 3rd ed. contains 94 lessons grouped in five units. Each unit consists of two or three interrelated chapters. Most lessons include additional background information, cross-curricular links, and science activities. 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 alignment of Science 3 with national standards are located in the back of the Teacher's Edition.