During World War II, Irena Sendler, a Polish Catholic social worker, organized a rescue network of fellow social workers to save 2,500 Jewish children from certain death in the Warsaw ghetto. Incredibly, after the war her heroism, like that of many others, was suppressed by communist Poland and remained virtually unknown for 60 years. Unknown, that is, until three high school girls from an economically depressed, rural school district in southeast Kansas stumbled upon a tantalizing reference to Sendler's rescues, which they fashioned into a history project, a play they called Life in a Jar....