While quorum advisers normally teach the [Aaronic Priesthood] lessons, bishopric members, quorum presidency members or quorum members may teach a lesson. The quorum adviser will want to help the members of the quorum presidency or quorum members in their preparation to instruct the quorum. Those who teach should use the approved quorum manuals, basing their lessons on the spiritual and temporal needs of quorum members. Leaders may follow or change the sequence of lessons in the manual as needed.
Each young man should bring his scriptures to the meeting. Instructors should teach from the scriptures in connection with the approved lesson outlines.- Aaronic Priesthood Leadership Handbook, p. 8