There were several duties that belonged to members of Kirigakure, and one of those was protecting the future. Now, it should be mentioned that Kai was never really a fan of kids, they were noisy and lacked a sense of discipline that he wished that more people could be born with. That wasn't the case for all of them, and there were a few of the young students in the village that saw him like an older brother, but the majority were just a pain in his mind and he would often scowl at them when he passed them in the streets. It was perhaps childish that he disliked children simply because they refused to keep themselves under control, but he'd managed to do it at their age so why can't they? Well, whether or not he liked them, it was his duty to protect the village and to protect the village's future he had to help to protect the children of the village so there was another generation. There were several forms of protecting them, there was physically protecting them (something he did on a near daily basis, or at least did when he was still working with his father on tracking and removing missing-nins), and then there was mentally protecting them. This was making sure that they got a good education and didn't simply become a waste of space. He doubted people would like him to call them a waste of space, but he couldn't care less about their opinions. they were a waste of space until they actually did something that benefited the village. That was the only thing that mattered, and no matter whether people wanted to molly-coddle them, he wouldn't be one of those people.

It was for this very reason that when he found out that the academy was wanting someone to teach a class or two about specialist subjects that he signed himself up. He had several specialist subjects that they would probably find fascinating for him to teach them. After all, while there were the seven swordsman of the mist, there weren't very many archers, and the people who wanted to get into swordsmanship never really had someone come in and talk to them about it. The swordsmen tended to have two problems stopping them from doing things like that; Firstly, they were busy, it was their job to protect the village after all and they needed to take it seriously. Secondly, they were often egotistical fools - Kai could see that and whilst he respected them for their abilities he didn't like the way that they tended to let their abilities go to their heads. So, as he walked into the classroom, his usual outfit making the people in the class stare at him like he was some sort of circus clown. Especially, apparently, the headwasteband. The teacher had, apparently, been in the middle of introducing him when he walked in, smiling at the members of the class.

"I don't know what you think you know about the art of the sword, but I'm going to teach you from the bottom up. So, before I begin, I apologize for any of you that actually know something about the sword, it would be wrong of me to ignore the needs of others simply because you're a little bit above their level." He tried to smile, remembering that the code required it's practitioners to be polite. He honestly couldn't give less of a shit about what the brats wanted, he was giving them an education, they should be grateful that he was gracing them with his presence. Not bothering to tell them his name, sure that the teacher would have already done that little introduction for him, he got on with the lesson.

"Now, I'm going to move over the basic areas you want to target the opponent when you're fighting, alright?" He asked, and when people nodded, he set the sword down for a second, before picking up the chalk and writing on the board. Within a few moments, he had drown a rudimentary skeleton of a person.  It was quite well done, nothing that could be considered professional-standard, but it suited his purpose. Then, drawing a series of dotted lines to separate parts of the skeleton, he labeled them with separate terms. Do, Suki, Men and even kote.

"These are the basic parts that you need to target in battle, and all for different reasons. The Kote is when you want to do a non-lethal takedown but want to make sure that they aren't able to threaten you any more. Essentially, what this does is remove their hands, as you are cutting down on the wrist. Without the hands, people who specialize in ninjutsu can not weave their signs, and those who use swordsmanship themselves or use taijutsu disciplines, or even those who use puppets are all but useless. There are, in fact, very few arts that the loss of the wrist doesn't cripple, Genjutsu, Seijutsu, Senjutsu and perhaps Kuchyose being the only ones I can think of off the top of my head that it doesn't stop, but even with those it still lowers the opponent's efficiency. I hope you're writing this down, you're going to need it." As he gave a quick, annoyed glance to the class people nodded and began scribbling down notes. Damn, it felt good to be respected... or, perhaps, just feared.

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The sounding of scribbling shot through the air as he told people to write down this information. it was a good sound, it was the sound of education, of improvement, of the gathering of knowledge, and it even felt so pleasant to Kai that he started to smile despite having not actually grinned since he was in here. It was weird, he was enjoying the soudn of people learning more than he was enjoying being able to do his duty for the village, it seemed like it was turned on its head.

Continuing on after giving a moment to let everyone write down what he had got this far, he moved back to the board and pointed to the next target area that he had mentioned. This one was a dotted line that pointed to the stomach, referring to it as "Do". He had always figured that Do was from the same basis as the chakra style, but since Do meant "earth" or "soil" he didn't understand why the chest was called that. People in the class seemed confused too, but he was going to have to mention that later. For now, he explained what it actually meant.

"Alright, this is Do. As you can probably guess, it's the chest. However, and I apologize for it being not obvious on the diagram, but this is actually the area of the chest that's above the hip. Because, there you can bisect someone clearly. It's below the rib cage, so you don't have to worry about that on top of the spine, and if you're lucky, you can even avoid slicing through the kidney, although in the heat of battle, it's not as easy as that. The good thing about this is that it's the second most commonly left open area. People will expect an attack to Men, which I will explain about later, but what you can do here is give the impression that you're going for a lower attack, say slicing off a leg, but instead go for this spot. This is also good if you want to really torture your enemy, they will bleed out rapidly but not rapidly enough for it not to be painless. It's a longer death than Suki, and it's not instant like Men." he said, his tone seeming a little too happy about the concept of torture, and when he caught the teacher's eye he gave her a look that simply spelled out how little he cared about what she was thinking. The class seemed interested in this information, and so she should be happy that she was being aided by the village at all .

Turning back to the board, he pointed to the next one. "As previously mentioned, this is Suki. It's also known as the windpipe, and unlike the other target areas, this is not designed as a cutting technique, although cutting techniques would work as well, since people don't tend to survive very long without their heads. However, it was originally designed as a spot for you to shove your sword into, to slice cleanly through the windpipe to minimize the blood splatter on your sword. Why people bothered to come up with it rather than simply cutting through the neck itself I don't know, but I always find it better to make sure it's hard for people to find your wind pipe, and don't even get me started on the jugular." With that, he noticed several different pairs of eyes going to the golden bands around his neck. Whether it was because they were appraising whether or not it would be effective, or simply whether they were wondering whether to laugh at the fact that a boy was wearing jewelry, he didn't know. didn't particularly care either.

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Finally, it came to the last one and the most blatantly obvious of what happened. It should, perhaps, be noted that this one was something that everyone should know. But, still, he knew that if he didn't mention it to them then the teacher would look at him like he was an idiot and actively request that he mentioned it. So, clearing his throat, he mentioned the last one.

"and this final one is called Men. Yes, like the gender." he said, before anyone could put their hand up to ask any stupid questions. By cutting them off at the pass, several people put their hands down, apparently all having thought of the same smart ass comment at the same time. It was a moment of success for Kai but he was so busy concentrating on his lesson that he didn't really feel any elation about being able to stop them being smart-asses. So, instead, he pointed to his own head, leaning his head forwards and drawing a line through the middle of his head. It seemed a little strange, but he did it exactly through the middle of his head, indicating it with his middle finger and drawing people's attention to it.

"As you will no doubt know, the brain is what keeps the body alive. damage the brain, and you'll live slightly worse. Damage it badly enough, and you'll die. That is what Men is designed for." he said, before straightening back up and running a hand through his hair, setting it back into it's normal spiky style. it felt good to go back to normality, he thought momentarily before continuing.

"The blade comes down on someone's head, bisecting the brain. Although the main style of the cut is a clear symmetrical bisection - as in, exactly down the middle so that there's an equal amount on both sides - But, that is by no means the ONLY way to do it. I'm sorry, Haruto-sensei, do you mind coming over here and kneeling down whilst I demonstrate?" he asked, before deciding that it came out wrong and adding "Don't worry, I'm not actually going to cut you, I'm only going to show the locations to do it for maximum efficiency." the man, although not seeming mollified by this, willingly came over and knelt in front of Kai as he withdrew his blade. This was old, and it was rusty and clearly needed refurbishment, but he was not going to do that for a while yet. Not that he wouldn't like better equipment, but he just didn't have the money for it.

Putting it down on the place where the scalp met the face, he pressed the non-sharp side against his head, making sure not to cut him by accident by wielding it the other way around. The man seemed thankful about this little concession, although it seemed like it was basic courtesy to Kai and simply did not think twice about it, despite how much it clearly meant to the man. He had to be paranoid or something.
"Now, if you cut here, it will be a shallow cut, and in fact the headband was originally designed to be worn so that this would be prevented. However, if you do it here," with that he moved the sword so it was pressing down on  a diagonal edge, slightly to the right of the head and going directly away from his body rather than perpendicular to it. ", then you will most likely slice through both the Parietal and Frontal lobes." For a moment, it seemed like he was forgetting who he was talking to, and instead simplified it to
"You'll kill them almost instantly." that, they understood.

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