Chapter 34: A Lie
The passage you've provided seems well-written for the most part, but I've made some minor corrections and suggestions for improvement:
The lecture hall buzzed with chatter as all the students waited for the arrival of the professor. Soon, Professor Thomas strode to the front of the room, his stern expression hinting at the seriousness of the situation. He cleared his throat, commanding attention.
"Good morning, class," he began, his tone dripping with a mixture of authority and frustration. "I've just finished grading the derivative assignment, and I must say, I'm not surprised by the results. Like I told you previously, this assignment was only to test your level of aptitude and skill, to understand where you stand in terms of your grasp of mathematics. As expected, most of you have fared badly."
CREATORS' THOUGHTS 
har_k
har_k Hello all! Have you ever had a professor who would not believe you?
I have always felt that teachers play a big role in their influence in shaping young minds. And their belief or lack of goes a long way in shaping our outlook towards ourselves and our society.
I once had a teacher. She was substituting for our homeroom teacher and was well respected in the school. However, with only one day in her class, I felt disillusioned. She was a great teacher but she was also biased. She would only give a chance to the good students while even the average ones were not beleived even when the truth was exposed. Have you ever had a professor/ teacher like that?
Gifts
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received Weekly Power Status
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Ranking 
-- Power
stone