CSD received accreditation with both AdvancED, now called Cognia, and Association of Christian Schools International (ACSI) in 2008. This accreditation opened the doors for competitive athletics and fine arts as CHS was granted membership into the Missouri State High School Activities Association (MSHSAA).
CSD maintains this accreditation. ACSI requires re-accreditation every five years with 2019-20 being a re-accreditation year. Re-accreditation includes a site visit by an accreditation team, curriculum review, overall review of school process, and business office review.
Christian High School is also a designated A+ High School.