The document discusses the features and purposes of textbooks, workbooks, and handbooks used in social science education. It states that textbooks are the core instructional material and provide structured and systematic knowledge on the curriculum. Workbooks are smaller supplemental materials that allow students to directly complete practice problems. Handbooks are reference guides that help teachers plan lessons and understand curriculum objectives. The document also outlines criteria for good social science textbooks and cautions in their use, as well as the roles and advantages of workbooks and handbooks in supporting teaching and learning.