The math teacher, whose eyesight is worrying, wears a pair of black-rimmed glasses. His facial expression is sometimes livid and sometimes he smiles. His hair often looks twisted into a ball and he looks a little thin in an ordinary dark T-shirt. Probably because he learned more mathematics, his head sometimes looks like a rectangle, and sometimes it looks like an inverted triangle. Besides, he has a great personality.

On the first day of school, he issued the order that "homework must be handed in before eight o'clock, otherwise there will be no deduction for over-evaluation". This is really hard. I was full of drowsiness before going to school. How can I have time to think about handing in my homework? I lost a lot of points for this and it took me a long time to get used to it.

Sometimes he gets angry because of current news, so he will pour out his views to us in class. He spoke with great devotion and clarity. With the improvement of eloquence, it gets better every day.

Sometimes he sees that everyone is studying hard and working hard to solve problems. He will be playful and give his classmates nicknames as rewards according to his personal characteristics. If you think about it carefully, you will find it really suitable and special.

Most importantly, he taught us critical thinking.

"Have you finished your homework?" One day, he asked everyone that when the camera flashed, the corners of his mouth were trying to keep serious.

"I wrote!" The whole class spoke in unison.

"Have you done all the examples?" He smiled slyly.

"I did it!" The consistent answer is always true or false.

"Oh?" He questioned, "Nobody found anything wrong?"

No one answered this time, and everyone was confused and turned to reading. What? There will be fraud in the book? Shouldn't every audit and verification ensure its perfection? Everyone started a carpet search again and still found nothing. "aye? Take ours, right? There must be a problem. " I thought to myself.

"Look again?" He looked at everyone expectantly. So there was another wave of books.

The expectation in his eyes (because his eyes are not clear, but probably) should have faded, leaving only disappointment. He raised his eyebrows: "Forget it, let me tell you ... Please turn to page 49 ..."

"So that's it!" After feeling, everyone suddenly realized.

Today, the phrase "Don't think what I show you is right, you should think about its correctness" often echoes in my ears, and his seriousness at that time often emerges.

This is my math teacher. I remember that class very deeply.