Head of Teaching at Hogwarts

Friday afternoon, in the principal's office.

Russell had just sent Professor Flitwick away.

This morning, the goblins in the Magic Factory had completed their requirements. Russell went to check and get all the mini-maps and integrators.

The efficiency of goblins is always so high. As long as there are diamonds, they are synonymous with "faster and more economical" in the magic world.

In order to further accept the work results of these goblins, Russell and Flitwick just came to happily experience three updated Wizards League Glory.

Of course, their gameplay is different from the students, and is closer to the computer games of the previous life, where they use transformation techniques to fight against projections on the wall.

This is not a game, but for the sake of students’ teaching experience, Russell decided to call this a “special teaching activity” from now on.

Having just completed three special teaching activities, Russell was going to let the kitchen elves prepare some late-night snacks to reward himself.

A portrait on the wall of his office reminds him that there is a little witch outside looking for him.

With a wave of his hand, the door to the principal's office opened automatically, and he saw Hermione with an excited expression on her face.

"Headmaster...Professor Russell...I...did it!"

Hermione was a little out of breath as she spoke, obviously running all the way here.

"Don't be anxious, sit down and speak slowly." Russell waved his hand, and a chair automatically appeared opposite the desk, and Hermione sat down obediently.

"Please sit down. What would you like to drink? Pumpkin juice, black tea, butter beer, or Magic Coke."

"Butter beer."

"Underage wizards can't drink, why not try Magic Coke?"

"Huh? Oh, I mean, okay."

Taking a sip of the ice-cold Magic Coke that appeared out of thin air on the table, Hermione gradually regained her composure.

Then she saw the wall behind LS Er, which happened to be what it looked like after the game in Wizard Canyon, a huge blue "Victory", and the scene after the explosion of the red square base.

Is this the enthusiastic Professor Russell?He must have been trying to improve the teaching effect of Wizard Canyon just now!

Moved, Hermione took another sip of ice-cold Magic Coke and felt a chill and refreshing sensation all over her body. Suddenly, she burped.

The little witch's face turned red for a moment, and she quickly covered her mouth.

"It's okay, Magic Coke is a drink I invented. It contains gasified joy agent and carbon dioxide, so burping is normal."

Hermione nodded, feeling completely relaxed. She quickly opened her schoolbag, took out three pieces of parchment, and handed it to Russell, "Professor, this is my final assignment."

Russell did not take the parchment or read it, but said: "Through my book, you must have discovered that my requirements for practice must be more than theory.

The last homework exercise in my book is for you to try to analyze the magic principle of the floating spell, and at the same time improve the floating spell based on Newton's third law and real life. If you have gained anything, you can tell me directly. "

Hermione nodded confidently, stood up, took out her wand, pointed it at the floor, waved the wand, and with the sound of "Wingardium Leviosa", Hermione suddenly became ten centimeters taller.

Of course, this was just an illusion. No matter how much the levitation spell was changed, it would not make people grow taller. The truth was that Hermione suddenly levitated and let herself fly out of thin air.

Half a minute later, Hermione landed firmly on the ground, and Russell nodded with satisfaction, "Tell me, Miss Granger, tell me your thoughts."

Hermione thought for a few seconds, seemed to be organizing her words, and then said: "When I first came up with the idea of ​​using a levitation spell to fly, I thought it was impossible.

Because the essence of the levitation spell is to use magic power to lift a corpse, just as a person cannot lift himself, a wizard cannot use the levitation spell to lift himself, or cooperate with others to lift each other. "

Russell nodded with satisfaction and motioned for Hermione to continue.

"But after thinking about it later, I found that it is a paradox that people can't lift themselves!" Hermione's tone became more and more confident,

"If a person stands on his head, then he can be considered to have lifted himself up. Even when we usually stand and walk, we can also be considered to have lifted ourselves up with our legs."

"Very good, very detailed observation, starting from daily life, this is great." Russell praised.

Hermione smiled sheepishly, and then continued: "But these are just daily routines. They lack theoretical support and cannot summarize the rules. I know that I saw Newton's third law in the book.

The action and reaction forces between two interacting objects are always equal in magnitude, opposite in direction, and act in the same straight line.

I summarize the core of this passage as 'the action of force is reciprocal'. When we lift ourselves with our legs, we are essentially using a force on the earth, and then the reaction force given by the earth allows us to stand.

The discovery of mechanics gave me a new idea, so I started to try, using the floating spell downwards on the ground, trying to lift the entire earth with the floating spell. Sure enough, the earth lifted me in turn, and I successfully floated. stand up! "

Hermione finished her speech and began to look at Russell expectantly.

"Excellent explanation and practice! Make bold assumptions and verify carefully. Your imagination is wild while maintaining the rigor of logic.

You have done everything I asked you to do, whether it was starting from the levitation spell or combining the reality of life with Newton's three laws of force. You have done a great job. It's great. I want to add fifty points to Gryffindor! "

Hermione was a little embarrassed by the praise and lowered her head shyly.

Russell's compliment came completely from the bottom of his heart. He originally thought that these little wizards would only be able to think about the principles in this area a little bit and would not be able to come up with reliable logic. Unexpectedly, Hermione could even put it into practice.

And judging from her steady landing performance, she must have tried it many times.

Making bold assumptions and careful verification, his imagination was wild while maintaining the rigor of logic. Russell became increasingly satisfied with this future study committee member.