Illustration: Dan Mezick

Southern Poverty Law Center: Teaching Tolerance Program
One of most extensive web sites on tolerance issues, with lesson plans and many resources for teachers.
URL: http://www.splcenter.org/center/tt/teach.jsp

The Underground Railroad @ nationalgeographic.com 
Routes to Freedom, Time Line, Classroom Ideas & Biographies
URL: http://www.nationalgeographic.com/features/99/railroad/

National Underground Railroad Freedom Center
URL: http://www.freedomcenter.org/

Freedom Bound
URL: http://www.lycoming.edu/art/underground

Women's Rights National Historical Park 
URL: http://www.nps.gov/wori/

Educators for Social Responsibility
URL: http://www.esrnational.org/index.html

more resources...