Jens Ludwig : Graduation , Jonathan Guryan rates for big urban schools only about 50 % . Many believe academic learning not feasible when disadvantaged kids reach teen devote a year . They say program of small-group tutoring raised kids ' performance considerably . Writers : It worked in U.S. , why not elsewhere ? Key is not to give up with teens .
Jonathan Guryan , Jens Ludwig : Graduation rates for big urban schools about 50 % . Many believe academic learning not feasible when disadvantaged kids reach teen years . They say program of small-group tutoring raised kids ' performance considerably . Writers : It worked in Chicago , why not elsewhere ? Key is not to give up with teens .