enrolled in middle schools and high schools, with approximately 150,873 teachers. About 69 percent of these teachers were male. About 98% of Korean students finish secondary education. The secondary-school enrollment figure also reflected changing population trends—there were 3,959,975 students in secondary schools in 1979. Given the importance of entry into higher education, the majority of students attended general or academic high schools in 1987: 1,397,359 students, or 60 percent of the total, attended general or academic high schools, as compared with 840,265 students in vocational secondary schools. Vocational schools specialized in a number of fields: primarily agriculture, fishery, commerce, trades, merchant marine, engineering, and the arts. Competitive entrance examinations at the middle-school level were abolished in 1968. Although as of the late 1980s, students still had to pass noncompetitive qualifying examinations, they were assigned to secondary institutions by lottery, or else by location within the boundary of the school district. Secondary schools, formerly ranked according to the quality of their students, have been equalized, with a portion of good, mediocre, and poor students being assigned to each one. The reform, however, did not equalize secondary schools completely. In Seoul, students who performed well in qualifying examinations were allowed to attend better quality schools in a "common" district, while other students attended schools in one of five geographical districts. The reforms applied equally to public and private schools whose enrollments were strictly controlled by the Ministry of Education. In South Korea, the grade of a student is reset as the student progresses through elementary, middle and high school. To differentiate the grades between students, one would often state the grade based on the level of education he/she is in. For example, a student in the first year of middle school would be referred to as "First grade in Middle School (중학교 1학년.)". Middle schools are called Jung hakgyo (중학교) in Korean, which literally means middle school. High schools are called Godeung hakgyo (고등학교) in Korean, literally meaning "high school". Middle school Middle schools in South Korea consist of three grades. Most students enter at age 12 and graduate at age 14 or 15. These three grades correspond roughly to grades 7–9 in the North American system and Years 8–10 in the English and Welsh system. Middle school in South Korea marks a considerable shift from primary school, with students expected to take their studies much more seriously. At most middle schools,