However, from the latter half of the Heian period government posts were transferred by heredity, as were the instructors of Daigakuryo; in order to keep the heredity system, family education developed, in which the instructors taught only their sons or selected disciples outside Daigakuryo, for example, in their own houses.
だが、平安時代後期から官司請負制のもとで官職の世襲化が進み、大学寮の教官も特定の氏族の世襲となって、教官たちは世襲の存続のために自己の子弟・一族や限られた門人に対してのみ限定して、大学寮外の自宅などで教授するという家学化が進んだ。