Cena, wherever she is these days, deserves a medal. This video is a classic.

Here we get to see how the teacher followed up with the student, so let’s tackle these questions:

- What can we say that Cena
*does*know? - What is going through her head as she answers these questions? Where does she go wrong?
- What are the teacher’s moves in this clip? What is her strategy for uncovering the student’s errors?