Scenes from the Classroom #12

This week, the yawning differences between sets....

Top set year 7:
Me: Who can give me an example of a year from the 1st century BC?
Student: 120?
Me: No, because remember that funny rule I taught you about centuries....?
Student: Oh yeah! 20!

Middle set year 7:
Me: Who can give me an example of a year from the 1st century BC?
Student: Dinosaur!
Me:

I can't even....