This industry comprises establishments primarily engaged in furnishing academic courses and associated course work that comprise a basic preparatory education. A basic preparatory education ordinarily constitutes kindergarten through 12th grade. This industry includes school boards and school districts.

• Elementary schools
• Parochial schools, elementary or secondary
• High schools
• Primary schools
• Kindergartens
• Schools for the physically disabled, elementary or secondary
• Military academies, elementary or secondary

• Academies, elementary or secondary
• Boarding schools, elementary or secondary
• Elementary and secondary schools
• Elementary schools
• Finishing schools, secondary
• Handicapped, schools for, elementary or secondary
• High schools
• High schools offering both academic and technical courses
• High schools offering both academic and vocational courses
• Junior high schools
• Kindergartens
• Middle schools
• Military academies, elementary or secondary
• Montessori schools, elementary or secondary
• Parochial schools, elementary or secondary
• Preparatory schools, elementary or secondary
• Primary schools
• Private schools, elementary or secondary
• School boards, elementary and secondary
• School districts, elementary or secondary
• Schools for the handicapped, elementary or secondary
• Schools for the intellectually and developmentally disabled (except preschool, job training, vocational rehabilitation)
• Schools for the physically disabled, elementary or secondary
• Schools, elementary
• Schools, secondary
• Secondary schools offering both academic and technical courses
• Seminaries, below university grade