Chapter 312: 312: Make a small difference

In the math class, the teacher is explaining several error-prone questions.
Many people did the last big question of the last exam wrong.
The only student who got a perfect score on the math test paper, but changed the answer by himself, and deducted 14 points.
Don't mention the math teacher's heart-stuck.
This time I found a few questions of the same type and focused on explaining them.
"Let's take a look at this question."
The math teacher took a piece of chalk and wrote on the blackboard, then turned around and looked at the lesson plan.
Jiang Lingzhi held a pen in his hand and stared at the blackboard, but uncontrollably remembered what he said in the equipment room just now.
A confession to me.
The person I like is here, now I can start talking.
Knowing that Jiang Ling was resting his elbow on the table, holding his small face, the pen between his fingers turned twice, and the corners of his lips couldn't help but tilt up.
Who wants to confess to him is very affectionate.
The next seat is empty.
Immediately after coming out of the basketball court, Jiang Lingzhi asked Li Shunan to take time off and go home to rest.
It's been half an hour now, and I don't know if he is home.
Jiang Ling knew his eyes were staring at the blackboard, but his thoughts drifted away inexplicably.
On the podium, the mathematics teacher looked around: "Does any student have an idea?"
This question is too difficult to solve.
Everyone buried their heads low, for fear of meeting the teacher's sight, they were caught by the math teacher.
As a result, among the students with their heads down, the second-to-last row, the student who dared to stare directly at the blackboard, became very outstanding.
The mathematics teacher originally wanted the students who scored in the last test to get up and solve the problem, but they looked around and couldn't find it.
The sight was successfully locked to Jiang Lingzhi, and he was very relieved.
"Jiang Ling knows that he seems to be very confident. As expected, the first grade is different. He already has ideas so soon."
Hearing his name, Jiang Lingzhi instantly recovered.
Haven't realized what happened.
The math teacher said happily: "Come on, come up and write about the problem-solving process."
Jiang Ling knew: "..."
Sure enough, he couldn't play desertion in class, and God was caught in a flash.
Jiang Lingzhi glanced at the title on the blackboard, and seemed familiar.
This question seems to have been told to her at the same table.
so far so good.
Otherwise you will be ashamed.
Jiang Lingzhi put down the gel pen in his hand, walked to the podium, picked up the chalk, and wrote down the detailed process of solving the problem.
She wrote down line by line.
The handwriting is neat and neat.
After she finished writing, the math teacher nodded in relief.
"Yes, that's it. I remember the last time Jiang Ling knew that the last question was wrong. It seems that I can review this type of question when I go home."
The math teacher gently pointed under the podium: "Okay, go down."
Jiang Lingzhi nodded: "Thank you teacher."
After putting the chalk in his hand on the podium, he walked straight down the aisle.
The mathematics teacher still spared no effort to praise her: "You should always ask Jiang Lingzhi for advice and study."
"Why people can sum up experience from failure, and the solution is very good."
Jiang Lingzhi breathed a sigh of relief, and after returning to his seat, he couldn't help taking out his phone and glanced at it.
There is an unread message.
A message sent two minutes ago.
【Got home】
Jiang Lingzhi glanced at the podium, and returned a message: [I'm still in class, take a good rest. 】