Later that day, Harry, Hermione, and Ron were extremely exhausted from all the lessons, even though it was their first day back to school. The three were in the Gryffindor Common Room, accompanied by Neville, Parvati, Lavender, Seamus, Dean, and two third year girls who were doing their homework.
"What did you teach the Huffelpuffs and Ravenclaws today Harry?" asked Hermione, getting something out of her bag.
"Oh, I just introduced them to the basics again, as refreshment to their learning in first year. Then, I told them that for the next two weeks we'll be studying history rather than Defence Against the Dark Arts, but it'll be fun," he replied, stretching.
"Hermione, what's that?" asked Ron, pointing at Hermione's bag.
"This? It's thread, you know, for S.P.E.W," she answered.
"What? You're still knitting hats for those house-elves?" asked Ron in anger.
"Yes I am, I told you that I won't give it a rest until they have decent wages," replied Hermione.
"Sooner or later, there will be no house-elves left of Hogwarts because of you!" roared Ron furiously.
"I don't care, I'm telling you----" Immeadietly, Harry took out his wand.
"Silencio!" he muttered.
At once, Hermione and Ron both were silent, and didn't open their mouths.
"I'm terribly sorry for that, but it seems that there's no other way of calming you down," said Harry. Five minutes later, Hermione and Ron ceased to be silent. They talked again, about the house-elf issue.
"Look guys, I'm very tired, I'm going to sleep, you can stay here all night arguing about those stupid house-elves (Hermione's face was red)," said Harry, yawning. Minutes after he went upstairs to sleep, Hermione and Ron went upstairs too. No one was left in the common room.

For the next month, students from sixth year have been learning quite a lot. In transfiguration, they carried on with Human Transfiguration and learned how to transfigure someone into two creatures at once. In Herbology, they learned about Mush Roses, which were plants that had the stem of a rose, and on top, a mushroom. They learned about its properties, the most important is that it can produce a red liquid that can burn skin. In Defence Against the Dark Arts, with Harry teaching of course, students have learnt the impediment jinx and reductor curse. In potions, they've only revised some potions from previous years, such as the Draught of Peace. In care of Magical Creatures, they've learnt more about Fixards, and then, they studied Winged Monkeys, Jellycats, and Eagle Crabs. They were very fascinating creatures indeed, they had lots of strengths. In astronomy, they've learnt how every ten years, three gigantic stars line up to make peace everywhere on Earth. The students were sometimes just bored, with repeating the same thing on and on and on in lessons, but in other times, they were just so excited. But, why couldn't have the previous years been similar to this?
"When will I ever get these corrected?" said Harry, looking at the tests that he gave the fourth years. "There must be one hundred and fifty rolls of parchment to correct."
"I know Harry," said Hermione sympathetically," it must be terrible. Staying over the nights to correct every single piece of parchment, reading between lines, it must be very frustrating!"
"I don't blame you mate, for how you feel," said Ron, clapping Harry on the back.
"Tell you what," started Harry," I'll go correct these in my classroom, perhaps there I could check in books for correct information students have written here when in doubt."
"Do it if it suits you," said Hermione.
Harry got up, collected all the papers which were a very heavy load, and stepped out of the common room to head of to his classroom. Filch, the caretaker, was there, checking if anyone was out of bed. Although Harry was a teacher now, and had every right to wonder along the corridors after hours, he didn't dare speak to Filch. Deep in his heart, hatred of Filch filled it. He clearly remembered all the grief Filch gave him since his first year at Hogwarts, and remembered the time when Filch missed Umbridge because she sneaked out of the castle last year. At last, Filch was gone. Harry tiptoed to his classroom's door, careful to not make any noise, and reached inside his pockets to get the keys, but his pockets were empty.
"Not again, forgot the keys," whispered Harry to himself.
Then, he reached to the other pocket in his robes, took out his wand, pointed it to the keyhole, and said, "Alohomora". At once, the door was unlocked. Harry entered, quickly went to his desks and began to correct the papers. He was now correcting at least the eighty fourth roll of parchment, and so far, every paper got over ninety percent. He was a bit impressed with his teaching now, and began to trust himself. His hands were feeling numb, and he couldn't have moved another finger. Harry yawned and yawned, but still resisted the dizziness, and continued on correcting the papers. At least and hour passed, when suddenly, Harry heard someone approaching his door. He wondered who it was. There was a quick knock on the door, and then, Snape came in.
"Professor Snape," began Harry," what brings you here at this time of night?"
"The headmaster has sent me to remind you of something," started Snape, with a wicked smile on his face.
"What?" asked Harry, looking curious.
"You for sure remember the circumstances last year. You have been having all those visions, and not normal dreams. Am I correct Potter?"
"Yes,"
"Well, the headmaster just sent me here to remind you of practicing Occlumency every night before you go to sleep,"
"What? But I don't have those dreams anymore, I mean I----"
"You will do as you are told Potter. Believe me, this is not my wish, but the headmaster's. Now, kindly listen to him, and do not disappoint me, or I might report you,"
"Report me? This is ridiculous! Honestly Professor, those weir visions-----"
"Potter!" shouted Snape loudly." Don't forget that Lord Voldemort won't rest until you are killed!"
Not only that this was the answer Harry expected to hear from Snape, but Snape, for the first time in six years, has dared to speak Voldemort's name.
"Well, I-----" began Harry.
"Harry, listen to me. You are the Dark Lord's target since sixteen years, when he tried to kill you. What the headmaster and I tell you, is for your own good. Practice freeing your mind from all of those thoughts, or else, Voldemort will, again, manipulate them. I promise you Potter, that if you don't practice, you'll be sneaking out of lessons, maybe even your lesson, to go to the headmaster and explain the situation," explained Snape.
"Ok," said Harry quietly.
"This was just another warning, Potter. Remember, it's for your own safety," said Snape, now moving away from Harry's desk, heading to the door.
"Good luck," said Snape, and he shut the door behind him.
Harry was now completely bewildered by Snape's attitude. He has spoken Voldemort's name, he spoke kindly to Harry, and Harry noticed that this was a great change in Snape. Anyway, after that, Harry returned back to correct the tests of the fourth years. There were only twenty rolls of parchment left, he was feeling wearisome. He had no wish to continue on correcting, but he insisted on completing his work. Another half an hour passed. The castle was absolutely silent. Suddenly, Harry's scar was burning so hot, it was excruciating pain that he never experienced before. He put his hand on it, and then, saw some red liquid on his hand. His scar was bleeding. This was very painful. Harry got out of his chair, and tried to calm down, but the pain came again, so sharp. He could no longer stand it, then, he fell to the floor. His glasses were broken, his eyes closed. He was beginning to sink into the shadows.
Harry was in the corridors of the castle, looking very curious and vigilant. He was looking around him, as though expecting any danger to attack him. Then, he reached the eighth floor of the castle, and turned to the right. He entered a room, so dark that he couldn't have seen a thing. He lit his wand, and pointed it around. When suddenly, he felt extremely cold… He was seeing ten tall hooded figures approach him. They were dementors. He quickly said the incantation "Expecto patronum," but nothing happened. The dementors were coming nearer, and nearer to Harry. Then, they held his hand, and were lifting him to the air. Harry wasn't able to speak a word. He saw something, glowing in a green color. It was a gigantic wolf, which he never saw anything like before. It was opening its mouth, and then came the cold voice of Lord Voldemort. Harry was struggling to get out of the dementors' grip, and run away.
"Harry, Harry, Harry," spoke Voldemort," sixteen years I've been waiting for this moment. Trust me, there will be no escape for you this time. It's time that you die,"
Instantly, Voldemort raised his wand, laughed, and said Avada Kedavra. Harry, at once, saw flash of brilliant green light, and dropped down to the floor. He was dead.
"Noooooooooo!" shouted Harry. He just awoke from a terrible nightmare, or more likely, a terrible vision. Harry was catching his breath now, his heart beating so fast. He got up, repaired his broken glasses with Reparo, and went out of the classroom. He didn't even care to correct the remaining tests of the fourth years, he was in deep agony. He was running to reach the Gryffindor Common Room. Quickly, he muttered Seftus Prefectous, and the portrait of the Fat Lady sprang open. Straight away, he climbed upstairs, and went to sleep. He wanted to relax, to free his mind. Now, he began to see the true value of Occlumency.