CKHS was for the first time ranked in the top 2% of the nation academically in 1984 and has continued to be through the 2015–2016 school year. CKHS has also garnered two Washington Achievement Awards for closing the Achievement Gap, and has also appeared regularly in the U.S. News & World Report as a nationally ranked school (Data complications with the move to adding ninth graders in 2014–2015 have led to an erroneous omission for the 2016 list).
CKHS achieved academic excellence for the first time in 1984, ranking among the top 2% of schools nationwide. It has continued this success through the 2015–2016 school year. CKHS has also received recognition for narrowing the achievement gap with two Washington Achievement Awards and regular appearances on the U.S. News & World Report list as a top-ranked school (However, data issues related to adding ninth graders in 2014–2015 led to an error in its 2016 ranking).