Teaching is the third gift listed in Romans 12:6-8. Jesus was a teacher (Matthew 4:23) as was Paul (1 Timothy 2:7). Elders are to be teachers (1 Timothy 3:2). It is important for the church to have teachers (Acts 13:1).
Good teaching has certain characteristics. It presents the truth (Matthew 22:16). It is done with authority (Matthew 7:29). It obtains correct information from the right source: God’s Word (Acts 15:35). Doctrines of men lead to vain teaching (Matthew 15:9). Good teaching is impartial (Matthew 22:16). It often involves helping a student recall what is already known (John 14:26). A good teacher is patient and not quarrelsome (2 Timothy 2:24). That teacher is consistent (1 Corinthians 4:17). A dedicated teacher is steadfast; he or she keeps teaching (1 Timothy 4:11). Good teaching requires maturity (Hebrews 5:11-14).
There is a word of warning. There are many false teachers (2 Timothy 4:3, Revelation 2:14,20, James 3:1).