The 2024 ISBA High School Mock Trial Invitational was held on March 16 and 17, 2024, at the University of Illinois - Springfield. Teams representing 50 high schools from across Illinois participated in the event. College Preparatory School of America (CPSA), won first place and will represent Illinois at the National High School Mock Trial Competition in Wilmington, Delaware, on May 2-5, 2024. In second place was Stevenson High School, and in third place was Maine South High School.