There is also an on-the-job graduate student who has to work in his own post for three years before he can take the exam. It is less difficult and more suitable for in-service teachers who want to take the postgraduate entrance examination. On-the-job graduate students study while working. They don't have to resign from their present school. They usually teach at school and take the college entrance examination during the exam. This is your so-called work-study program.