New immigrants share a subway ride over the Charles River and much more. Part of Gemma Open Door for Literacy series, Yankee Doodle is read at a slow pace so that new readers and people new to the language can follow along. The Charles River divides Boston and Cambridge, and the Red Line ties the cities together, traveling through an expanse of class and cultures along its route. When an unlikely combination of riders share an afternoon train, they are surprised to discover what's common in their American experience