Existing law requires, during the next revision of the publication "Health Framework for California Public Schools," the Instructional Quality Commission to consider developing, and recommending for adoption by the State Board of Education, a distinct category on mental health instruction to educate pupils about all aspects of mental health. Existing law requires mental health instruction for these purposes to include, but not be limited to, specified elements, including reasonably designed and age-appropriate instruction on the overarching themes and core principles of mental health. This bill would require each school district, county office of education, state special school, and charter school that offers one or more courses in health education to pupils in middle school or high school to include in those courses instruction in mental health that meets the requirements of the bill, as specified. The bill would require that instruction to include, among other things, reasonably designed instruction on the overarching themes and core principles of mental health. The bill would require that instruction and related materials to, among other things, be appropriate for use with pupils of all races, genders, sexual orientations, and ethnic and cultural backgrounds, pupils with disabilities, and English learners. The bill would require the State Department of Education to develop a plan to expand mental health instruction in California public schools on or before January 1, 2024.