Health includes physical health and mental health. According to the students' situation in the class, it is mainly from the aspects of eye hygiene (playing computer for a long time, reading without rest for a long time, watching while walking or lying in the quilt), ear hygiene (listening to songs with headphones), anti-acne (if adolescent students are prone to acne), eating habits (no breakfast, no drinks, no snacks and other junk food), exercise habits (mainly for some students who don't like sports), and work and rest habits.
For students, a healthy attitude+correct diet+reasonable work and rest+moderate exercise = health.