- 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.