How can high school educators improve graduation rates, starting in ninth grade? What do we know about student outcomes at charter, selective enrollment, and other high school options in CPS? What tools and data can help school leaders improve their students’ learning gains? What can GPA, attendance, and tests tell us about student performance and outcomes? How can high school educators, higher education professionals, non-profit programs, and CPS resources help students create post-secondary goals and plans? Since 1990, Consortium researchers have explored these questions, and many more. Here’s what we’ve learned about high schools: