More than two million children attend over 3,800 public schools in 852 local school districts across Illinois. Nearly all of these districts have collective bargaining agreements (CBAs) that determine the terms and conditions of employment. This study evaluates 543 collective bargaining agreements across Illinois, representing nearly two-thirds of all school district CBAs. While labor agreements establish enforceable terms upon the employees and the school districts, the analysis provides an understanding of how the contents of teacher labor contracts contribute to innovation and collaboration within Illinois’ large public education system.