Lewis Hine was a teacher in the early 20th Century who became so concerned about the abuses and evils of Industrial era child labor in the U.S. that he quit his job teaching and toured the country taking photographs of child laborers of all stripes. His photos were later instrumental in the adoption of child labor laws in this country. Check out his photos and the accompanying lesson plan ideas if you’d like to explore concepts like the rights of the child, family, work, health, self, community, heroes of history, class, agism, photography/documentary work, the power of art to change society, or being a courageous ally.
Photos are here: http://www.archives.gov/education/lessons/hine-photos/
And lesson plan ideas are here: http://www.archives.gov/education/lessons/hine-photos/activities.html