Back at school
A lady was sitting in the waiting room for her first appointment with a new doctor.
She noticed his degree on the wall, which bore his full name.
Suddenly, she remembered a tall, handsome, dark-haired boy with the same name had been in her high school class some 30-odd years ago.
"Could he be the same guy that I had a secret crush on, way back then?" she thought.
Upon seeing him, however, she quickly discarded any such thought. This balding, gray-haired man with the wrinkled face was way too old to have been her classmate.
After the consultation, she asked him if he had attended her high school.
"Yes. yes, I did.' he gleamed with pride.
"When did you graduate?" she asked.
He answered, "In 1987. Why do you ask?"
"You were in my class!!!!", she exclaimed.
He looked at her closely, paused and asked...
"What subject did you teach" ?