This is NOT an exhaustive analysis of New Testament occurrances of the word that equates to teacher; nonetheless, the Word of God reveals the truth about teachers.
All bolded verses are included in the interlinear table below for your convenience.
Examination of the Lord Jesus Christ's position on these words:
In Matthew 23:8, we can see that children of God are not to call anyone teacher (since rabbi means teacher as per John 1:38), and this according to God Jesus as recorded by the Apostle Matthew.
YHWH said through Jeremiah that the children of God would teach no brothers no more (Jeremiah 31:34).
In Ephesians 4:11, we can see that the Apostle Paul used the word teachers.
In Luke 16:13, just like Matther 6:24, our Lord Jesus Christ plainly states that we can not serve two masters, and the Greek word kurio is translated to the English word master; nonetheless, the Greek word kurio has also been translated to the English word lord - as in Lord Jesus Christ! The Master, the Teacher, the Lord is God alone.