This item from IBCA Hall of Fame Coach, Bruce Firchau:
For the many people who follow the IHSA state tournaments on an annual basis, you know that the IHSA tries to manage these tournaments for the boys and girls as equally as is possilble. We know that the 3 point shootout competition was added to the IHSA boys' tournament shortly after the 1987 rule change that brought the 3 point line to high shool basketball. Do You Know in what year did the IHSA add the 3 point contest to the girls' tournament?
That would be for the 1993 tournament. It was in that year the "The Happening" was introduced to both tournaments and included the 3 point contest for the girls.