The Session is composed of Teaching Elders and Ruling Elders. All elders are each equally an elder and each gets one vote. Teaching Elders are ministers or pastors called to teach, preach, and administer the sacraments. Ruling Elders are undershepherds called to administer the government of the church and meet the spiritual needs of members in their parish.
Session
But as for you, teach what accords with sound doctrine. Older men are to be sober-minded, dignified, self-controlled, sound in faith, in love, and in steadfastness. Titus 2:1-3