Over 75 percent of Cooper's Middle and Upper School students participate in at least one sport. Students choose to compete in girls volleyball and softball, boys football and baseball, and boys and girls cross country, soccer, basketball, track, tennis, swimming, and golf. Since 2004, varsity teams have competed in the highly regarded
Southwest Preparatory Conference that comprises 19 independent schools in Texas and Oklahoma. Cooper's first state championship was achieved by the varsity girls tennis team, who won the 1992
TAPPS Class A title. More recently, the football team won the SPC 3A championship in 2021, their first-ever state title in football, and repeated the feat in 2022. The Boys' Varsity Tennis Team have also achieved many accomplishments, winning back-to-back SPC 4A Championships in 2022 and 2023 The Middle School teams participate in the Houston Junior Preparatory Conference. == Extracurricular Activities ==