Mission & ValuesBrentwood School is a vibrant and diverse community whose purpose is to promote personal and intellectual growth. We provide challenging, engaging programs in a nurturing learning environment, devoting care and attention to every student. Embracing high standards of character, commitment, and achievement. Brentwood School encourages students to think critically and creatively and to act ethically. In its relatively short history, Brentwood School has grown to be one of the premier independent day schools in Southern California. Founded as a non-profit corporation in 1972, Brentwood School acquired the Brentwood Military Academy, which had existed since 1902. Brentwood School opened in the fall of 1972 as a co-educational, college preparatory day school with grades 6-10. Grade 11 was added in fall 1973, and the school graduated its first senior class in June 1975.