Points for creativity...

Student was late to homeroom. He sauntered in, very confidently.

Me: You're late.
Student: Nuh-uh, I have a pass! Look! *hands me his agenda*
Me: What are these initials?
Student: I dunno.
Me: Well who signed your pass?
Student: I dunno.
Me: *reads a little closer* It says "DM". Who's "DM"?
Student: Me.
Me: You signed your own pass?
Student: Yeah, 'cause I knew I was going to be late.

Nice try.