In the Soviet Union, the government stipulated that the student-teacher ratio at universities should not be more than five to one. In the third year, students began to select their own research specialties and entered their tutor's teaching-laboratory to study.
在蘇聯，政府規定大學師生比例不得超過五比一，學生三年級就開始選擇自己研究的專業，進入導師所屬的教研室學習。