The school purchased a home at 24 Pourtales for boarding of students in the fall of 1965. In 1970 the school opened its program to boys and in 1975 was renamed The Colorado Springs School when it became "fully coeducational" for grades 7 through 12. In 1976 the Children's School was founded for education from Kindergarten through 12th grade, and merged with The Colorado Springs School. Experiential education was integrated into the school's educational program beginning in 1976. A pre-kindergarten program was established in 1994 and in 1998 a preschool was added to the school. The school's boarding program ended and a Homestay Program was established in 2000.