Klein Oak High School serves more than 3,000 students in grades 9 through 12. The school offers classes in English, math, science, social studies and foreign languages. It provides programs in art, band, dance, choir, drama, orchestra, and physical and health education. Klein Oak High School also organizes athletic activities, such as football, volleyball, golf, baseball, soccer and basketball. The school has a library that offers access to database, maps, and online technology software and hardware tutorials. It operates environmental, German, Latin, art, bowling and anime clubs. In addition, the school manages a parent-teacher organization. Klein Oak High School is a part of the Klein Independent School District.