- - Edison is a key historical figure.- Special sales opportunities to American history museums and historical sites.- Includes index and "Words You Know" section that highlights terms and concepts from the text and illustrates them with photographs.Grades K-4 National Social Studies Standards- Time, Continuity, and Change: II- Accounts of past events, people, places, and situations contribute to our understanding of the past- People, Places, and Environments: III- Describe how people in different areas reflect ideas, personality, culture, and wants and needs in their homes, schools, etc.- Science, Technology, and Society: VIII- Identify and describe ways in which science and technology have changed society.