"Good morning, class. Are we sitting comfortably?" the Doctor grinned while Rita groaned at the cringe of what he just said. He gave a playful glare at her after noticing the expression on her face and her body shivered, he then turned to the board proceeding to grab a pen and write large letters onto the white board.

'Why did I agree to this?' she thought. 'I could be in the kitchen with Rose, instead, I'm stuck in a classroom, again.' Rita quietly groaned.

The Doctor turned back around to the class of kids that did not look like they were enjoying the class at all. 'Honestly, I feel for you kids Rita thought. I'm stuck pretending to be his teaching assistant. Great now I'm talking to myself it's year ten of school all over again.' Rita sighed

"So, physics. Physics, eh?" The Doctor began, pacing around the front of the desk then stopped next to Rita. "Physics. Physics. Physics!" he grinned at her then continued to ramble. "Physics. Physics, physics, physics, physics, physics, physics, physics." He then stopped. "I hope one of you is getting all this down."

"I'm most definitely not" Rita mumbled rolling her eyes the Doctor just continued grinning at her.

'So he's enjoying this? Time Lord don't make me shave your hair off in your sleep, oh how Rose would kill me if I did that.' She chuckled at bit knowing that the blonde loved the Doctors hair even though she didn't know Rita knew that.

"Okay let's see what you know." the Doctor spoke snapping Rita back into reality. "Two identical strips of nylon are charged with static electricity and hung from a string so they can swing freely. What would happen if they were brought near each other?" he asked the class which were clearly bored, silent and not moving much like zombies who just couldn't move. Apart from one boy who's arm flew into the air. Rita grinned moving her head up in his direction.

"Yes, er, what's your name?" the Doctor asked the boy who looked pretty nerdy with thick glasses, not that Rita was judging or anything but he did look stereotypically like a young nerd that was constantly bullied.

"Milo." he replied placing his arm back on the table.

"Milo! Off you go." the Doctor smiled glad someone was paying attention.

"They'd repel each other because they have the same charge," Milo answered getting the question correct.

"Correctamundo!"

Rita scrunched up her nose. The Doctor noticed then added: "A word I have never used before and hopefully never will again."

"I agree never, ever say that word again."

"If you wish" he grinned then continued to question the class "Question two. I coil up a thin piece of microwire and place it in a glass of water." he emphasised the word water making Rita chuckle. "Then I turn on the electricity and measure to see if the water's temperature is affected. My question is this. How do I measure the electrical power going into the coil?"

The young boy's hand shot up again, not even Rita knew the answer to that and she got an A+ in GCSE physics not that she liked to boast about it. The Doctor looked around at the bored zombie-like students.

"Someone else." He looked around the silent room and then pursed his lips "No? Okay, Milo, go for it." he nodded to the boy.

"Measure the current and PDs in an ammeter and a voltmeter."

"Two to Milo." The Doctor looked around the class once again. No one was paying any attention, he looked over to Rita who frowned at the class.

She never understood why the rest of the students apart from Milo were actually silent and extremely bored it was never mentioned in the 'episode' to her memory.

The Doctor placed his hand next to his mouth so the class could not see what he was saying and then mouthed over to her. 'Anything?' the brunette shrugged then mouthed back 'I don't know this sorry, try asking some more questions' she shrugged not being much help yet giving him a secret without making it too obvious. She generally had no idea with as to what was wrong with all the students, she knew about the chips and why they were smart but not the zombieness.

"Right then, Milo," the Doctor turned back to the boy following Rita's advice "tell me this. True or false. The greater the dampening of the system, the quicker it loses energy to its surroundings."

"False."

"What is non-coding DNA?" the Doctor countered.

"DNA that doesn't code for a protein." he fired back. Rita moved her eyes from the Doctor to the boy as if she was watching a tennis match.

"Sixty-five thousand nine hundred and eighty-three times five?"

"Three hundred and twenty-nine thousand nine hundred and fifteen," he said automatically without thinking. The Doctor frowned.

"How do you travel faster than light?"

"By opening a quantum tunnel with an FTL factor of thirty-six point seven recurring." the Doctor blinked, his jaw dropped and he watched the boy then turned to Rita her expression mimicking his.

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The Doctor and Rita were standing in the line of the canteen for lunch, an hour or so after the event with Milo. The canteen was silent to Rita and the Doctor's amazement.

Rita never expected it to actually be so quiet in the hall except for the sound of feet moving on the floor. They collected their food the Doctor grinning at Rose dressed as a dinner lady who looked extremely pissed. Rita sent the blonde a warm smile as she collected her food and followed the Doctor to a table.

"How was that possible?" Rita whispered sitting down next to the Doctor, feeling the silents a little unnerving. She pushed her plate aside not wanting to touch the krillitane oiled chips.

"You have the foreknowledge" he smirked pointing it out and raising a brow.

"Trying to get you thinking, you can be a little thick at times" she chuckled leaning back on her chair and crossing her arms.

"Oh really?" He raised a brow again.

"Really" Rita nodded. "So what do you think it is?" She stopped leaning on her chair and leant forward resting her elbow on the table holding her head up.

"Well something is definitely odd here"

"No kidding" Rita chuckled again. "Seriously, though. Ideas?"

"Why don't we ask the dinner lady?" he smirked noticing Rose heading their way.

"Two days," Rose spoke through gritted her teeth once she reached the table.

"Sorry, could you just?" the Doctor pointed to part of the table with a fork in his hand. "There's a bit of gravy." Rose sighed rolling her eyes and started to wipe where he supposedly pointed. "No, no, just, just there." he pointed a little to the left. Rita grinned shaking her head and hitting his arm a little.

"Two days, we've been here." Rose continued.

"Blame your boyfriend." The Doctor argued making an odd face at Rita when he swallowed a chip.

'Now you're noticing it.'

"He's the one who put us onto this. And he was right." He turned to Rita who nodded in agreement. "Boy in class this morning, got knowledge way beyond planet Earth."

"You eating those chips?" Rose asked changing the subject.

"Nope" Rita answered.

"Yeah, they're a bit different." he frowned at Rita.

"Yeah, I tried one" Rita lied not wanting to touch the chips at all, she knew they were harmless except for gaining some knowledge but still didn't want them. "Didn't like them at all"

"I think they're gorgeous." Rose stole a few of the Doctors chips. Rita chuckled and pushed her plate to the other side of the table, allowing her to take her own since she wasn't going to be eating them anytime soon. Rose grinned and sat down opposite Rita. "Wish I had school dinners like this." She said with a mouth stuffed full of chips.

"It's very well behaved, this place." The Doctor looked around the room at the quiet students.

"I was just thinking that" Rita agreed.

"Mmm." Rose hummed unable to speak through her mouth filled up to the brim with chips.

"I thought there'd be happy-slapping hoodies. Happy slapping hoodies with ASBOs. Happy slapping hoodies with ASBOs and ringtones. Huh? Huh?" Rita shook her head disapprovingly. "Oh, yeah. Don't tell me I don't fit in."

"You don't fit in," Rita smirked at the Doctor who just smirked back at the brunette who then shook her head after a few seconds and looked behind Rose's head to see a rather angry dinner lady walking up to them. "Heads up" she mumbled. Rose pushed the plate back to her and short daggers at the pair who bite their lips holding in a grin.

"You are not permitted to leave your station during a sitting."

"I was just talking to this teacher and teaching assistant." Rita groaned a little, in her opinion 'companion' was bad enough but assistant. No thank you.

"Hello." the Doctor smiled up at the dinner lady not looking the slightest bit amused.

"He doesn't like the chips." Rose mocked.

"The menu has been specifically designed by the headmaster to improve concentration and performance." The dinner lady said slightly angry.

'No it's just the oil' Rita thought smiling to herself.

The dinner lady then directed her attention to Rose "Now, get back to work."

"See? This is me. Dinner lady." Rose spun around walking back towards the kitchen.

"I'll have the crumble." The Doctor joked.

"Make that two" Rita joined in raising a finger in the air.

"I'm so going to kill you two." she sighed walking off.

Rita noticed out the corner of her eye that one of the maths teachers which she knew to be a krillitane had walked up to one of the tables seating a few students, she lightly hit the Doctors arm trying not to make it not too obvious for Mr Finch who Rita know fully well was watching the canteen from above. Rita got his attention just as the maths teacher began to talk.

"Melissa. You'll be joining my class for the next period. Milo's failed me," Rita looked over to the Doctor who frowned continuing to watch the teacher. "So it's time we moved you up to the top class." he turned to the boy Rita remembered as Kenny, the boy who helped save the world. "Kenny, not eating the chips?"

"I'm not allowed." he answered placing an empty packet of crisps in his sandwich box.

"Luke. Extra class. Now." The teacher walked off out of the canteen.

"That was odd" the Doctor stated, turning away from the dinner table to Rita.

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After lunch, the Doctor and Rita headed to the staff room to do some exploring and 'investigating' before the next lesson began. The staff room held a few teachers sitting at a table chatting and a few standing around the room. The pair were talking to a teacher about how surprisingly clever the students were.

"Yesterday, I had a twelve-year-old girl give me the exact height of the Walls of Troy in cubits." he explained to them both.

"And, it's ever since the new headmaster arrived?"

"Finch arrived three months ago." he told the Doctor "Next day, half the staff got flu. Finch replaced them with that lot," he gestured over to some teachers at the other side of the staff room. Rita shivered a little then turned back trying not to draw attention to herself. "Except for the teacher you replaced," the teacher nodded to the Doctor "and that was just plain weird, her winning the lottery like that."

"How's that weird?" the Doctor asked.

"She never played. Said the ticket was posted through her door at midnight, and her teacher assistant was sacked except she did nothing wrong worked her for 5 years with no warnings or anything then she just goes."

"Hmm. The world is very strange."

"Sometimes I wonder if it's a little too strange" Rita chipped in. The door behind them then opened revealing the headmaster with a woman Rita knew from the 'show' as Sarah Jane Smith, Rita couldn't help but smile at the woman she noticed that the Doctor was also beaming away.

"Excuse me, colleagues." Mr Finch spoke up attracting everyone's attention his way. "A moment of your time. May I introduce Miss Sarah Jane Smith." He gestured to Sarah Jane. "Miss Smith is a journalist who's writing a profile about me for the Sunday Times. I thought it might be useful for her to get a view from the trenches, so to speak. Don't spare my blushes." The headmaster then left.

'Actually, she's investigating you lot.'

Sarah Jane walked towards the Doctor and Rita after Finch exited the staff room. "Hello." she smiled.

"Oh, I should think so." the Doctor tried to contain his smiled which wasn't working so well.

"Lovely to meet you" Rita smiled shaking Sarah Janes hand.

"And, you are?" Sarah Jane smiled.

"Rita Stone" the brunette answered.

"Hm? Er, Smith. John Smith." Rita rolled her eyes making sure Sarah Jane didn't notice.

'Someone has a crush' Rita jokingly thought to herself.

"John Smith." Sarah Jane thought for a moment. "I used to have a friend who sometimes went by that name." 

"Well, it's a very common name."

Sarah countered: "He was a very uncommon man, I also knew someone who went by "Rita Stone sometimes." She smiled a little, Rita frowned slightly but shrugged it off as a coincidence. "Nice to meet you both."

"Nice to meet you." The Doctors grin grew. "Yes, very nice. More than nice. Brilliant."

Sarah Jane looked a little concerningly at the way he was looking at her. "Er, so, er, have you both worked here long?" She asked Rita and The Doctor.

"No. Er, it's only my second day." The Doctor replied.

"Same for me" Rita added crossing her arms.

"Oh, you're new, then. So, what do you think of the school? I mean, this new curriculum?" She asked. "So many children getting ill. Doesn't that strike you as odd?"

"Hmm" Rita nodded. "Very odd"

"You don't sound like someone just doing a profile." the Doctor pointed out grinning to himself proudly.

"Well, no harm in a little investigation while I'm here."

"No. Good for you." the Doctor mumbled. Sarah Jane then began to walk away heading towards other teachers. "Good for you. Oh, good for you, Sarah Jane Smith."

"God I'm surprised you didn't scare her" Rita rolled her eyes whispering quietly so the woman wouldn't hear. "You're like the Cheshire cat with that grin is just scary." She told him he looked at her shaking his head, "like it's giving me the creeps."

The Doctor looked around then began to whisper a little. "So being on a Dalek ship doesn't creep you out but my grin does?" he raised a brow smirking.

"How do you know I wasn't scared? I didn't have foreknowledge of that Doctor, I was terrified." Rita admitted whispering as well. "Always good to be a little scared, though? Right Doctor?"

"Right" he nodded in agreement. They both left the staff room to head back to the Physics class for another long lesson before the end of the day.

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Rose shuddered a little holding her elbows while following the Doctor into the school entrance "Oh, it's weird seeing school at night. It just feels wrong. When I was a kid, I used to think all the teachers slept in school."

"I know someone who used to think that. Told them all that there were secretly bats that lived in the roof" Rita joked making a reference to the actual 'episode'

"All right, team." The Doctor turned to Rose, Rita and Mickey "Oh, I hate people who say, team."

"You hate yourself?" Rita raised a brow. "Sorry continue"

"Er, gang. Er, comrades. Anyway," he began to instruct everyone. "Rose, Rita, go to the kitchen. Get a sample of that oil. Mickey, the new staff are all Maths teachers. Go and check out the Maths department. I'm going to look in Finch's office. Be back here in ten minutes." The Doctor then walked off leaving the three standing in the entrance.

"You going to be all right?" Rose looked at Mickey with a face
"Me?" he looked at Rose offendedly "Please. Infiltration and investigation? I'm an expert at this." he began to walk off.

"Says the one who walked off in the wrong direction," Rita said under her breath. Mickey then shortly returned looking like an idiot.

"Where's the Maths department?"

Rose pointed down the corridor in the opposite direction. "Down there, turn left, through the fire doors, on the right."

"Thank you." he then walked in the correct direction.

"Let's go and find that oil" Rita smiled at the blonde as they both began to walk down the corridor. 

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The Doctor walked down the dark school hallway heading towards the TARDIS.

"Hello, Sarah Jane." said the Doctor in a monotone voice, Sarah Jane spun around her eyes wide.

"It's you. Oh, Doctor Oh, my God," she clasped a hand over her mouth "it's you, isn't it. You've regenerated." She smiled.

"Yeah. Half a dozen times since we last met."

"You look incredible." She spoke in shock.

"So do you."

"Huh. I got old." She denied the compliment. "What are you doing here?" Sarah Jane then asked.

"Well, UFO sighting, school gets record results. I couldn't resist. What about you?" He smiled at her proudly.

"The same." she then frowned. "I thought you'd died. I waited for you and you didn't come back, and I thought you must have died."

"I lived. Everyone else died," he said sadly looking down at the ground. "Everyone but her..." Hew sighed trailing off as Sarah Janer frowned. "Well, that's a lie in itself."

"What do you mean?" a frown formed on Sarah Janes face, she was confused with what he meant.

"Everyone died, Sarah."

"I can't believe it's you," Sarah Jane said again. The pair then snapped their heads in the direction of a high-pitched female scream.

"Okay, now I can!" she chuckled the pair both ran in the direction of the scream.

Sorry, this isn't as large as some chapters, I have to evenly split them as best as I can. Three chapters in school reunion so sadly not as large as Tooth and Claw but hopefully, you think there just as exciting.