105 ILCS 5/24-24
Subject to the limitations of all policies established or adopted under Section 14-8.05, teachers, other certificated educational employees, and any other person, whether or not a certificated employee, providing a related service for or with respect to a student shall maintain discipline in the schools, including school grounds which are owned or leased by the board and used for school purposes and activities. In all matters relating to the discipline in and conduct of the schools and the school children, they stand in the relation of parents and guardians to the pupils. This relationship shall extend to all activities connected with the school program, including all athletic and extracurricular programs, and may be exercised at any time for the safety and supervision of the pupils in the absence of their parents or guardians.
Nothing in this Section affects the power of the board to establish rules with respect to discipline; except that each board shall establish a policy on discipline, and the policy so established shall provide, subject to the limitations of all policies established or adopted under Section 14-8.05, that a teacher, other certificated employee, and any other person, whether or not a certificated employee, providing a related service for or with respect to a student may use reasonable force as needed to maintain safety for the other students, school personnel or persons or for the purpose of self defense or the defense of property, shall provide that a teacher may remove a student from the classroom for disruptive behavior, and shall include provisions which provide due process to students. The policy shall not include slapping, paddling or prolonged maintenance of students in physically painful positions nor shall it include the intentional infliction of bodily harm.
The board may make and enforce reasonable rules of conduct and sportsmanship for athletic and extracurricular school events. Any person who violates such rules may be denied admission to school events for not more than one year, provided that written 10 days notice of the violation is given such person and a hearing had thereon by the board pursuant to its rules and regulations. The administration of any school may sign complaints as agents of the school against persons committing any offense at school events.
105 ILCS 5/24-24