Here we are again.

This one on the list is: 1.) Switch his potion ingredients around on his Oh! So! alphabetically ordered potion store room shelves.

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Test1: Part A:

Harry fingered the piece of parchment in his pocket even as he stepped inside the Potions Store room. This one was free to the kids- they didn't need a reason to come in here and they could take whatever they wanted. Harry decided to start on this one first, before sneaking into Snape's personal stores. Harry recalled what Hermione and Ron had said.

'Oh, Harry, you shouldn't!' Hermione had gasped, her eyes dull with disappointment.

'Good on ya, mate!' Ron had grinned, clapping him on the shoulder. 'Remember, if you need help with anything, I'm here.'

Snape had, of course, ordered them all alphabetically. Harry knew this from having to re-order them all for detention. Snape had done this only this morning, so they were all in perfect order.

'Remember our plan?' Harry whispered to the red-head standing by the door.

'Yep,' Ron replied. 'Just call out "Oh my God, Professor, behind you!" if I see any teachers coming. Then you quickly hide under the Invisibility Cloak and get out of there.'

Harry nodded, smirking. He looked around the store room, trying to decide where to start. Eventually he pulled out something in the 'A' aisle and something in the 'N' aisle. He switched them, then moved on. He spent nearly half an hour re-ordering them all, and by the time he was finished, the whole store room was in a confusing mix. He leaned back to admire his work.

'Oh my God, Professor, behind you!' Ron shouted suddenly.

Quickly, Harry pulled his Invisibility Cloak from his back and threw it over him. He hurried out of the Store Room, brushing past Ron as he went, letting the boy know Harry was out. He glanced around, seeing no professors, and no students either. Harry threw the cloak off and glared at Ron.

'There are no teachers around!' He exclaimed angrily.

'Sorry, mate,' Ron grinned. 'But you were taking to long.'

Harry rolled his eyes. 'Right, well, lets get out of here before someone sees us.'

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Test1: Part A: Results:

Severus frowned as he leaned back in his chair, eyeing the student in front of him warily. The Slytherin only raised an eyebrow, waiting for him to speak.

'Completely mixed up, you say?'

'Completely. Nothing was in its right place,' the student nodded. Severus frowned, standing from his chair.

'Thank you, Adder, you may go now. 50 points to Slytherin.'

The student rushed off, a large grin on his face. Severus waited a moment, then swept out of his office, stalking down the hall and coming to a stop at the Potions Store Room. He hesitated, wondering if he really wanted to see what kind of destruction was in there. But he gripped the doorknob, turned and pushed the door open.

There was a lengthy pause.

'For Merlin's sake, I ordered this just this morning!'

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Test1: Part Ba:

Harry tapped his foot impatiently, watching Ron with frustrated eyes. He took a deep breath, lifted the glass he was holding and downed the golden liquid in a fluid motion. There was a moment where Harry and Ron just stared at each other, both ignoring the fact that they were in a girl's bathroom. Suddenly, Ron's hair started turning black.

'About time,' Harry muttered, turning away to give Ron some privacy. Once Ron had finished, Harry turned back and handed Ron his glasses.

'Ugh, I hate Polyjuice,' Ron scowled, shoving the glasses on. 'And this is going to suck.'

'You're telling me. Let's go,' Harry took a look at Ron, who now looked exactly like him, and held the door of the bathroom open. Ron walked past him and Harry, pulling on the Invisibility Cloak, followed him.

'Where do you think Snape is?' Ron muttered out of the corner of his mouth as they walked through the corridors.

'He'll be teaching a first year Gryffindor and Slytherin class,' Harry supplied, looking at the makeshift schedule he had drafted up, showing him exactly where Snape would be. 'He's way too predictable. Does the same thing every week.'

'You spied on him?' Ron sniggered. 'What kind of dirty secrets does he have?'

'None that we don't know,' Harry sighed. 'Other people have already exploited his secrets.'

'Damn,' Ron said softly as they went down the stairs, towards the dungeons.

'So, you know the plan?' Harry checked.

'Yes,' Ron sighed. 'I know the plan. You've asked me that, like, twenty times already.'

'Good,' Harry nodded as they stepped towards the Potions classroom door. 'I know we shouldn't have skived off Divination, but it will be worth it.'

'Are you kidding? I'd rather this than listen to that old phony talk!'

Harry glanced at Ron, smirked and then looked back at the closed classroom door. 'Okay, on three.'

Ron tightened his jaw, glaring determinedly at the doors.

'One.'

He reached up and took hold of the doorknobs.

'Two.'

He slowly turned them.

'Three!'

Ron threw open the doors and charged into the classroom.

'I object!' He yelled, stalking through the rows of children, towards where Snape was standing, frozen. 'I object, you monstrous creature! You hideous, deceitful-'

Ron stopped, staring up at the blazing eyes of an enraged Snape. The man was looking quite deranged, and he was trembling with suppressed anger.

'You fool,' he hissed. 'What in the name of Merlin do you think you are doing, Mr. Potter?'

'I…' Ron hesitated. 'Uhm, wrong classroom?'

'That's it!' Snape roared. '200 points from Gryffindor, and a months worth of detention, starting tonight!'

Harry grinned, watching with amused eyes. Everything was going perfectly.

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Test1: Part Bb:

Harry crept along the deserted dungeons, looking around for any danger. So far, he was completely alone and concealed under the Invisibility Cloak. He was careful not to make any noise as he made his way to Snape's privet stores.

He arrived, glancing around and pulling of the cloak. He pulled a piece of parchment from his pocket and read the password from it. As the patch of normal stone slid open, giving Harry entrance, the Boy-Who-Lived grinned, thankful he had watched Snape's every move. He'd spied long enough to gather plenty of personal information- including passwords.

He walked inside, watching as the stone slid closed. Turning back, he looked at the impressive amount of Potions supplies. If the supplies were in the right place, Harry would easily be able to find anything he wanted, even when he had never been there before. He walked past the shelves, pulling out some powdered moonstone and pulling out a jar of Red Horns. He switched them, and then moved on.

He knew Ron would be absolutely seething when he got back. Detention with Snape was never a happy picnic. But Harry needed Snape away from his personal stores, and the added bonus was that because Ron was taking regular drinks of the Polyjuice, he still looked like Harry. Snape would never be able to blame it all on him when he himself had been (supposedly) with him the whole night.

He would also get Hermione to vouch for Ron, so that Snape wouldn't be able to blame it on Ron either. And anyway, Ron would only have to do this one detention. Starting from tomorrow night, Harry would take over and do the rest of them.

A few hours later (Snape really did have huge personal stores); Harry had mixed a good deal of them up. He leaned back and admired his work. No way could Snape stay calm when he discovered what had happened.

Harry went to the door and slipped out, pulling the cloak back over him.

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Test1: Part Ba: Results:

Harry Potter was lounging in the Great Hall, having eaten all his breakfast, when Severus Snape had barged in. Harry elbowed Ron, and they both turned, grinning, towards the older man and he stalked up through the students.

'Albus!' Severus roared. 'This has gone far enough!'

The Headmaster surveyed him with disapproving eyes, his chin propped up on his hands. He waited until Severus had approached him before speaking softly. Every kid craned their necks to watch, but they could easily hear the conversation.

'What has gone far enough, Severus?'

'Your foolish, childish and completely idiotic antics!' Severus snarled in reply.

'I beg your pardon?' Albus asked politely, blinking in surprise.

'Only you and I know the password to my personal stores!' The Potions Master was red in the face, his eyes icy. 'And yet, they've been mixed up, just like the children's stores!'

'I'm sorry, Severus, but I'm afraid I didn't do it,' Albus shook his head. 'Perhaps someone else?' His gaze lingered on Harry, and the boy had t fight the urge to groan. Why did everyone immediately think he was responsible? Well, he actually was, but still…

Severus followed his gaze. 'Weasley!' he barked. 'It was you, wasn't it?! Potter got detention to keep me away while you raided my stores!'

'Professor!' Hermione exclaimed. 'Ron was with me all night! We were studying for our NEWTs! And besides, how would he know the password?'

Severus batted away the question and narrowed his eyes. 'Studying? I severely doubt Weasley was studying. Your NEWTs exams are months away.'

Ignoring the fact that they were having an argument in the middle of breakfast in the Great Hall, with every single student watching them, Ron pointed an accusing finger at Hermione and yelled, 'She forced me to!'

Harry let his head fall against the table, his laughter shaking his whole body.

'Severus, I do not think it was Ron Weasley,' Albus said. 'Perhaps we should search elsewhere?'

They'd gotten away with it! Harry could barely believe it. As soon as he, Ron and Hermione got out of the Great Hall, the dissolved into laughter and gave each other high-fives.

'I knew you'd come around,' Ron grinned at Hermione. She blushed and smiled back.

'Yes, well… It was funny.' She explained. But they all knew it was only because she was pissed off at Severus for grading her potion an 'A' when it was the best in the class. But really tipped her off, however, was the fact that Draco Malfoy got an 'O' when his potion had the wrong coloured steam rising from it.

'It was worth it,' Harry agreed.

'What's next?' Hermione grinned, and they all watched as Harry pulled his list from his pocket.

'Well…'

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Merry Christmas! I hope you all like this chapter. Please review, and have a happy New Year! (Woot, my birthday is on New Years Day!)