In 1991, Lundahl and North Junior High (now Bernotas Middle School) both received additions. Lundahl received a new north end classroom addition, cafeteria, locker room area, and second gymnasium.
In 1991, Indian Prairie Elementary School opened. Constructed on Village Road on the south side of town in what had once been a prairie, the school was named to honor the first school in Crystal Lake called South Prairie. Martin Anderson was Indian Prairie's first principal.
In 1993, an addition was built onto North Elementary which provided additional classrooms on the west side of the building.
In the spring of 1995, Lundahl Junior High became an accredited middle school and its name was officially changed to Lundahl Middle School Campus for the opening of the 1996-97 school year.
In 1996, Hannan Beardsley Middle School opened its doors on East Crystal Lake Avenue. HBMS's first principal was Ron Ludwig.
In 1997, Woods Creek opened on Alexandra Boulevard to staff and students. Woods Creek’s first principal was Dr. Betsy Les.