(2) Beginning with the 1988-1989 school year, for grades six through eight, instruction in comprehensive health must include the following subjects: community health, consumer health, environmental health, growth and development, nutritional health, personal health, prevention and control of diseases and disorders, safety and accident prevention, substance use and abuse, dental health, mental and emotional health, and reproductive health education. Sexually transmitted diseases are to be included as a part of instruction. At the discretion of the local board, instruction in family life education or pregnancy prevention education or both may be included, but instruction in these subjects may not include an explanation of the methods of contraception before the sixth grade. Beginning with the 2016-2017 school year, for grades six through eight, instruction in comprehensive health education also must include the subject of domestic violence.