(1)  In this section, “corporal punishment” means the intentional infliction of physical pain which is used as a means of discipline. “Corporal punishment” includes, but is not limited to, paddling, slapping or prolonged maintenance of physically painful positions, when used as a means of discipline. “Corporal punishment” does not include actions consistent with an individualized education program developed under s. 115.787 or reasonable physical activities associated with athletic training. (2)  Except as provided in sub. (3), no official, employee or agent of a school board may subject a pupil enrolled in the school district to corporal punishment.