Teacher: Billy, name two pronouns.
Sam: Who, me?
Teacher: Very good!

Chemistry classes were going on,
The teacher asked a girl student: What are nitrates?
The girl blushed and answered: Night-rates are costlier than day

One day, a very attractive under graduate visited the professor's office. The under graduate pulled the chair closer to the professor, smiled at him shyly, bumped his knee "accidentally", etc.
Finally, the undergraduate said, "Professor, I really need to pass your course. It is extremely important to me. It is so important that I'll do anything you suggest."
The professor, somewhat taken aback by this attention, replied, "Anything?"
To which the undergraduate cooed, "Yes, anything you say."
After some brief reflection, the professor asked, "What are you doing tomorrow afternoon at 3:30?"
The student lied, "Oh, nothing at all, sir. I can be free then."
The professor then advised, "Excellent! Professor Palmer is holding a help session for his students. Why don't you attend that."

A professor asked a student to remain for a few moments after class. Holding out the young man's assignment, the professor said, "Did you write this poem all by yourself?"
The student said, "Every word of it."
The professor said, "Well, then, I'm glad to meet you, Mr. Poe. I thought you were long dead."