Students who attend preschool regularly are significantly more likely than chronically absent preschoolers, those who missed at least 10 percent of the school year, to be ready for kindergarten and to attend school regularly in later grades. The study, which followed 25,000 three- and four-year-olds served by Chicago Public Schools (CPS) school-based preschool programs, finds chronic absenteeism is rampant among preschoolers in Chicago. In 2011-2012, almost half of three-year-olds and more than one-third of four-year-olds were chronically absent. This report examines the extent of preschool...