"The Double Life of an Undercover Teacher"

Chalk dust fell on Chen Ye's loosened second shirt button, and he spun the chalk with his fingertips. The cigarette butt flickered between his lips and said, "When climbing over a wall, mechanics must be taught. For example, the patrol route of the instructor is a sine function, and we have to use parabolas to avoid it -" The boy in the back row whistled, and the monitor Lin Xia's pen poked the third hole in the complaint book.Teacher Chen, "Lin Xia pushed her glasses," this is the third time this month. "She opened her notebook and found that the first two records were" teaching students to use trigonometric functions to calculate the angle of climbing over walls "and" using geometry knowledge to disguise morning exercise formations. Chen Ye flicked off the cigarette ash, and the chalk suddenly stopped spinning: "Little comrade, you don't understand. Mathematics is the wings of freedom -There was a rustling sound coming from the back seat, and the sound of the instructor's leather shoes was approaching the window. Chen Ye slapped on the platform: "Now practice!" The boys jumped onto the windowsill, and he snuffed out the cigarette butts: "Attention! The third wutong outside the wall is the fulcrum. Use the Pythagorean theorem to pedal -"What are you doing?! "The headmaster pushed open the door and entered. Chen Ye turned around and hit the blackboard with a chalk accurately: "Everyone, we are deriving a mathematical model for 'how to avoid patrol routes with parabolic trajectories'." He grabbed the lesson plan and stuffed his cigarette butt into the chalk box at some point. "Lin, please record: Question three, given that the instructor's step frequency is 0.8 meters per second, find the optimal wall climbing angleThe head teacher stared at the formula on the blackboard and pushed his reading glasses. "This... is quite interesting," Chen Ye smiled. "The beauty of mathematics lies in its ability to make all rebellions appear rational." Lin Xia crossed out the complaint in her notebook and wrote, "For the fourth time this month, he successfully turned the head teacher into a class representativeThe bell rang and the boys jumped off the windowsill in a parabolic posture. Remember, true freedom is not about climbing over walls, but about making everyone think you're solving a problem, "Chen Ye said as he straightened his shirt with the buttons still looseWhen Lin Xia was cleaning up her complaint book, she found that the fountain pen had blurred the two characters "Chen Ye" into a Mobius ring.---