Jesus (Yeshua‘) exercised the role of a rabbi. The Greek New Testament typically uses the word didaskalos which is the common word for a teacher. Once, a young man, who different gospels describe as rich and a ruler, called Jesus “Good Teacher.” His emphasis was not on the quality of Jesus’ teaching (though that was good too), but on the quality of His life.
Good Teacher in Greek:
Strong’s Concordance numbers: 1320, 18
Bible reference: Mark 10:17; Luke 18:18
As Jesus started on his way, a man ran up to him and fell on his knees before him. “Good teacher,” he asked, “what must I do to inherit eternal life?” (Mark 10:17 NIV)
The KJV translation, “Good Master,” seems to draw on the older custom of calling a teacher a “master,” as in “schoolmaster.”