City Garden is the only Montessori charter school in Missouri and has been recognized both locally and nationally for its excellent program, staff and community: In 2018, City Garden was awarded a 10-year Charter renewal by the Missouri State Board of Education, instead of the typical 5-year renewal. In 2021, CGMS expanded its preschool and kindergarten program and in 2022, CGMS opened its new Elementary and Adolescent Center (EAEC), housing lower elementary (1st-3rd grade), upper elementary (4th-6th grade) and junior high (7th-8th grade) students.