That Accusation Was Not Calculated

My high school algebra teacher asked me to hang back after class.

Teacher: “I’m convinced you cheated on the last test, so I’m failing you.”

Me: “What?! I didn’t cheat!”

Teacher: “You got almost every question correct, but you didn’t show any of your work. You must have copied the answers from somewhere. Tell me where.”

Me: “I did them in my head.”

Teacher: “What?!”

Me: “I did the algebra in my head.”

Teacher: “You can’t do algebra in your head.”

Me: “No, you can’t do algebra in your head.”

That was probably not the best response, but I was angry. I made a complaint to the principal, via my parents. When I demonstrated that I could complete a new algebra question in front of them without writing down my work, the teacher was forced to give me my passing grade.