Level three. By inquiring about the setting standards of private training institutions, it shows that the credit rating of vocational training schools is implemented in three levels: excellent first, good second and qualified third. Therefore, private vocational training schools are divided into three levels. Privateeducation, also known as private education, is a form of education relative to public education and public education. Refers to social organizations or individuals other than state institutions, using non-state financial funds to organize activities of schools and other educational institutions for the society.