What parents should know about 'latchkey kids' and staying home alone

In this Tuesday, Sept. 13, 2016 still image from video, students attend the fourth grade class of Kimberly Coleman-Mitchell at Oakridge Elementary School in Arlington, Va. Elementary schools in Arlington, South Burlington, Vt., and Holyoke, Mass., are among those that went homework-free at the start of the school year. (AP Photo/Bill Gorman)