After mastering wind, fire and earth style elemental jutsus from the scrolls he trained them so much that he could now perform them with minimum hand seals .
He also became proficient in rasengan ,
Due to his increased chakra ,he could now make 12 shadow clones which were divided into different tasks like mastering elemental jutsus,weapon techniques mainly swordsmanship, rasengan with elemental infusion mainly fire, wind and lighting (vanishing rasengan) , sensory and concealment jutsu (sensory range tripled and concealment jutsu mastered to the level no one could guess he was standing before you ) and one was going to bthe academy.
He was personally training physically and practice taijutsu.
The elemental jutsus he learned are
Great Fireball Technique:
A fundamental technique where a large, powerful orb of fire is expelled from the mouth.
Fire Release: Great Dragon Flame Technique:
A powerful jutsu that generates a stream of fire
Dragon Fire Missile:
A focused attack that projects fire in the form of a small dragon.
Wind Release: Severing Hurricane: Generates large-scale tornadoes made of wind blades.
Wind Bullet/Air Bullet:
A basic offensive technique where the user fires compressed air from their mouth or hands at high speed.
Gale Palm:
A technique that involves clapping hands together to create a compressed blast of wind, capable of knocking a person over.
Wind Style: Great Wind Explosion:
A technique that compresses a large amount of wind chakra into a small, powerful ball, which then explodes on impact.
Earth Release: Wall: Creates a strong defensive wall of earth, which can be enhanced to include quartz to nullify lightning's weakness.
Earth Release: Moving Earth Core: The user manipulates the ground to create large holes or elevations, allowing them to change the battlefield.
Earth Release: Mud River: Transforms the ground into a flowing mud river that can slide targets around.
EARTH STYLE Headhunter Jutsu" refers to an Earth Style technique , in which a ninja uses Earth Release to move underground and drag an opponent's head above the surface, immobilizing them.
During his fifth year in the academy they were taught the three basic academy jutsus
Transformation jutsu, Clone jutsu and substitution jutsu...
He had already learned and mastered them before joining the academy but he couldn't show that to others can he so he acted like he was having problems and kept his progress according to other medicore students...
He wanted to get more elemental jutsus and
Genjutsu style techniques and some healing jutsu ..
But he couldn't as no one would just give it to kirito, he could only steal the jutsu scrolls from others
But for that he needed to know where they keep the scrolls and not get caught even though he was confident in his concealment jutsu he couldn't just neglect the possibility of presence of sealing jutsus..
As he didn't know a thing about fuinjutsu..
So he could only wait .
As the fifth academic year came to an end he started to hunt the animals in the forest for experience and food ..as he couldn't afford the meat from market .
After some experience fighting the animals in the forest he decided to venture in the Forest of Death and using concealment jutsu he entered the forest without anyone noticing .
The first animal he encountered was a wild bear who was eating honey at the bottom of the tree .
Kirito decide to challenge it head on not using concealment jutsu.As he came in front of the bear .the bear noticied him and directly came to attack him without thinking as he thought of kirito as a harmless prey to be hunted .
As his claw was about to connect to kirito's body ,kirito side stepped and created some distance between them and quickly threw the shuriken at the bear who couldn't react fast enough and got hurt in the eye,
as kirito aimed at his weak point which are his eyes which don't have fur .After the attack kirito came in front of bear who still processing what was happening as the harmless prey he was about to shred to pieces vanished and he got injured in the eye ,it happened all in just 5 seconds and he looked as his attacker suddenly appeared in front of him and directly attacked him with a kunai which was surrounded by wind element chakra and directly sliced through bears neck.
Due to kirito's daily training for almost six years he was physical very strong and he also had mastered chakra nature transformation and shape transformation techniques he could coat his weapons in wind elemental chakra and increase its sharpness and reach .
He also used wind style elemental chakra at his feet to move freely and fastly ( like boruto) .
He had also started to increase his reflexes and reaction time by asking his clones to throw water balloons at home fastly as he stands at the centre and his clones enclose him and throw the balloons ,he had to do his best to dodge the balloons..
Although he couldn't dodge all the balloons he has started to improve vastly ,now he could dodge many at once ..
After fighting the bear he went back to his regular forest after storing the body of bear for cooking..
As he continued to fight the animals in the Forest of Death daily ..
His last year in the academy started were the physical spars became regular so he had to go to academy himself and leave the training to his shadow clones ..
During the break he went to the academy's library and started to read the different medical books along with his 3 clones who have used transformation jutsu they also read different books on survival, tactics and geographical conditions along the ninja world.
His clone daily comes to the academy during lunch time and evening to read books from his 3rd year ..
So he had depth knowledge about medical knowledge, tactics, survival skills, geographical conditions of different areas, fighting styles of different ninja villages and clans ..
Today he had a different motive ,he was going to read all the jutsu scrolls present on the second floor of the academy which he didn't had the permission to read .
He had already checked if their was a sealing jutsu their and found none ..
He performed his concealment jutsu and went to the second floor and performed shadow clone jutsu untill he had almost depleted his chakra as he didn't need to give the clones huge chakra ammount for practice here they only have to conceal themselves and memorise all the scrolls here
He made almost 30 clones ,
Who went to different sections and started their job ..
He learned some low level elemental jutsus, genjutsus which were mainly E or D rank ,some basic fuinjutsu which his clones wrote down on a scroll for copying as fuinjutsu was not easy ..even though his memorising speed was high ( memories something after reading 2 ,3 times)...
When he had completed with all the scrolls he didn't dispell the shadow clones because he knew he would have a headache if he dispelled them together.
So he started to dispell 1 after every 10 minutes..
After dispelling all the clones except for 1 he went back to his apartment and directly went to bed because he had a headache due the vast knowledge and experience he got from the clones ..
The undispelled clone dispelled after kirito went to sleep..