Suimi High School,
"Next, we'll be covering the experiment for measuring gravitational acceleration with a simple pendulum."
The teacher at the podium droned on, while most of the students below were already half asleep.
"During the experiment, use a 20-division vernier caliper to measure the diameter of the pendulum bob. The reading is shown in Figure A. The diameter of the bob is"
"The length from the suspension point to the bottom of the bob, l₀, is shown in Figure B."
While controlling his 'clone,' Akihi Yu flipped through the textbook in his hands. High school math in Japan was much the same as it had been in his previous life. Some topics that hadn't been required in his previous life were mandatory here, while many topics that had been required there weren't tested in Japan. Overall, the math in his previous life had been a little harder, with more concepts students were expected to master.
But with college entrance exams, the difficulty had never been about what was on the test. It was about how many people you had to compete against for a spot.
Of course, Akihi Yu wouldn't have cared even if he'd handed in a blank paper. He had already transcended the mortal world.
Bang!
"W-what?!"
The sound of a chair hitting the floor rang out abruptly. The boy who had shared the video with the others stood up sharply, phone in hand and shock written all over his face.
". My class isn't interesting,"
The teacher at the podium stopped explaining and looked at the boy.
"but that's no reason to play on your phone in class and disturb the other students."
"N-no, Teacher Yuanzhu."
His face twitched. He glanced at his phone, then immediately looked away in terror.
The boy held up his phone,