Jay Gillen was a founding teacher-director of the Stadium School in Baltimore City, who is still teaching math in the City Schools, and working closely with the Baltimore Algebra Project. In a book published last fall, he indicts an educational system that he says is stacked against poor and disadvantaged students. He suggests that we change that by encouraging students to organize and rebel. The book is called “Educating for Insurgency: The Roles of Young People in Schools of Poverty.”