Elders must be able to teach (1 Timothy 3:2) so that they can build up the church in sound doctrine and refute false teachers (Titus 1:9; cf. Acts 20:30-31). Elder teaching can take lots of shapes: one-to-one instruction, connect groups, during prayer meetings, classes, or preaching. An elder doesn't need a PhD in biblical studies, but they do need to be able to faithfully explain biblical truth.

Both the Old and New Testaments repeatedly employ the metaphor of "shepherding" to describe the spiritual leadership of God's people. Not surprisingly, the New Testament views elders as shepherds as well (e.g. Acts 20:28; 1 Peter 5:1-4). The elders' mission is to lead, teach, protect and love their church members the way shepherds care for the sheep in a flock, so that the church members will grow up into spiritual maturity (Ephesians 4:11-13).

Elders have a measure of authority over the local church. That's why the New Testament also calls them "overseers" or "Bishops". The elders' authority is not absolute or unquestionable, nor should it be exercised in a domineering manner. Yet God calls his shepherds to provide leadership for the flock, and, in general, God expects the church to submit to that leadership (Hebrews 13:17).