This is my contribution
They are from the world therefore they speak from the world and the world listen to them.
The book of Ephesians 4 ; 11 when Jesus gave gift unto them, some Appstle some Evangelist and some teachers.
Although Sunday school was not found on the Bible but there's teaching ministry, teachers must to teach everyday not on Sunday alone, even the pastor and Evangelist most do there pastorate on daily activities.
this is my video:
This is the link to brother Eli's video