Chicago Public Schools officials say the district has seen a 65 percent drop in out-of-school suspensions and a 57 percent decrease in expulsions since 2003.
The district compared the 2012-2013 and 2014-2015 school years.
The declines in out-of-school suspensions and expulsions reflect changes CPS made last school year to its student code of conduct to limit disciplinary actions that take students out of the classroom.
"Students are more likely to succeed when they have access to a positive learning environment where they have the resources to succeed," CPS CEO Forrest Claypool said in a statement. "More constructive disciplinary practices create more valuable instructional time for students who are usually the most in need of extra support. By working together, teachers and administrators can keep these positive trends going."
CPS says in-school suspensions ticked up 4 percent between 2012-2013 and 2014-2015, "signif(ying) that more students remain in the learning environment to receive restorative methods that address discipline issues," reads a news release from the district.