Will a longer school day help close the achievement gap?

Amanda Paulson:

A longer school day can help improve student test scores, closing the achievement gap. But critics question the cost of those additional hours.
Going to school from 8 a.m. until 5 p.m. may sound like a student’s nightmare, but Sydney Shaw, a seventh-grader at the Alain Locke Charter Academy on Chicago’s West Side, has come to like it – as well as the extra 20 or so days that she’s in class a year.
“I’m sure every kid at this school says bad things about the schedule sometimes,” says Sydney, who was at school on Columbus Day, when most Chicago schools had a holiday. “But deep down, we all know it’s for our benefit.”
Finding ways to give kids more classroom time, through longer hours, a longer school year, or both, is getting more attention. President Obama and Education Secretary Arne Duncan support a lengthier timetable. Many education reformers agree that more time at school is a key step.
Charter schools like Alain Locke and KIPP schools (a network of some 80 schools that are often lauded for their success with at-risk students) have made big gains in closing gaps in student achievement, partly through expanded schedules. Other schools have been making strides, too – notably in Massachusetts and in the New Orleans system.