Day 1
Teacher: Good morning pupils
Pupils: Good morning sir
Teacher: what subject do you have today?
Pupils: Mathematics
sir
Teacher: How can it be? Let me go and check my time table (so the teacher went out and never returned)
DAY 2
Teacher: Do you know what we have today?
Pupils: Yes!
Teacher: then it is of no use to teach you what you have already known
DAY 3
Teacher: Do you know what we have today?
Pupils: Yes!No (some said yes and some said no)
Teacher: Good, let those who know teach those who don't know.
