Student: A variable who don't need no man
A power failure.
Because he had a wee cough
A leek.
Me: No. My gf said we needed to talk
Teacher: Why are you Late Today? Student: Because of sign down the road. Teacher: What does a sign have to do with your being late? Student: The sign said, "School Ahead, Go Slow!"
Original joke) Because that's where students have the most potential.
The variables aren't necessarily related.