Educational background is one measure of teachers' qualifications.
Whether teachers either majored or minored or are certified in the fields they teach is an indication of their substantive and academic qualifications in those subjects. Students in mathematics classes were less likely than students in any other core subject to be taught by a teacher who majored in that field. In both public and private schools, biology students were more likely than chemistry or physics students to have teachers who majored in that specific science. In public secondary schools, mathematics students were generally less likely to be taught by teachers who were certified, majored, majored or minored, or who held a graduate degree in their class subject than were students taking any other main subject.