High Quality Content by WIKIPEDIA articles! Oak Grove High School is a public secondary school located in North Little Rock, Arkansas and serves grades 9 through 12. Oak Grove High School is administered by the Pulaski County Special School District. Since 1967, Oak Grove has been accredited by the North Central Association (NCA) Commission on Accreditation and School Improvement (CASI). Oak Grove's official colors are green and white and the school's mascot is a hornet.