17 But since doctrinal training ought to tend not to a mere communication of ideas but to a true and intimate formation of the students, teaching methods are to be revised both as regards lectures, discussions, and seminars and also the development of study on the part of the students, whether done privately or in small groups. Unity and soundness of the entire training is carefully to be provided for by avoiding an excessive multiplication of courses and lectures and by the omission of those questions which scarcely retain any importance or which ought to be referred to higher academic studies.
Source: Optatam Totius (Vatican.va)