How could one best approach a research project based on the work of Harriet Tubman and the Underground Railroad?
This is a broad topic that needs to be narrowed to something more manageable; the key is to determine what direction you want to go. For example, you could take a biographical approach, looking at Tubman's life and history from the time she was young up to and including her work helping slaves escape. Perhaps you would rather focus on the Underground Railroad itself, looking at how it developed, where the safe houses were located, and some of the routes traveled by escaping slaves. Another approach might be to look at the Underground Railroad in the context of the abolitionist movement and the Fugitive Slave Laws passed by Congress over the years in an attempt to pacify the South and avoid civil war.