Collective education
The mental health education in schools is the teacher's education for the class students, that is, the education for a group. It can't take care of the particularity of each student in detail. Different from family education, parents educate their children independently.
Teaching objectives and evaluation system
The teaching objectives and evaluation system of school mental health education are different from family education and other education. For example, family education, according to parents' personal situation, is very casual.
professional knowledge
The school teachers have guaranteed relatively complete professional knowledge. Family education is the opposite, and each parent's professional knowledge is different.