La de daa, here we go with this one again. I'm trying something, like I stated before, with the whole writing chapters ahead of time and frankly, it's working out pretty well for me. Well, at least from my standpoint. Which is probably a couple months before of yours. Who knows. :I

Anyway, enough babble, onto the point of the author's notes, if they even have one. Since we never truly fully hear a Doctor Who plan as they usually are supposed to surprise us I guess, we're going to start surveillance. Oh boy. This will be very, very fun.

Disclaimer: Well looky here, I still don't own Doctor Who. Real shocker isn't it. This will be even more of a shock, the BBC owns it. Omfgwhat.

Allons-y!

Author's POV

"Right then. Mornin' class." A certain tall, skinny man in a blue suit, red tie, and red converses said, setting an awkward briefcase down on his desk at the front of the class. "I'm your substitute for the week, Dr. Tennant." He reached for the black Expo marker and scrawled his name on the white board. Everyone whispered amongst themselves, eyeing the man strangely. The Doctor grinned down at the class.

A fairly chubby boy with a pretty messy hair cut raised his hand. The Doctor pointed in his direction. "Yes, what is it mister...?"

"Eugene, Dr. Tennant. I'd like to ask, are you British?" He asked with a smug smile on his face, as if he knew something everyone else didn't. Shay, from the back of the class rolled her eyes at her sworn arch-nemesis. That kid had no idea what he was talking about, as far as she was concerned.

The Doctor noticed Shay's rude gestures at the chubby boy from the back, grinned with a hint of smirk in her direction. Before anyone could notice, though, he moved his attention back to Eugene. "Ah, yes I am. I was born there but I moved here a few months ago. Actually, as a matter of fact, I got my teaching degree at Oxford." The Doctor lied through his teeth, smiling the whole time. Eugene nodded like he knew exactly what the Doctor was talking about.

"But anyway, off the questions of my nationality, where are we today..." 'Mr. Tennant' muttered halfway to himself, tapping his finger on his chin. "Ah yes, physics. Phyyyyyysics. Okay, I'm not going to start with that, since I'm getting deja vu here...but right then, physics." He rambled, making the whole class snicker not all that discreetly. Shay and Yasmin giggled from the back of the room, knowing almost exactly what was in store for the entire class. "What do we know about physics?"

A freckled girl with short, bright orange hair shot her hand up from next to Yasmin. The Doctor pointed to her. "Um, well, it has to do with forces and matter and that stuff, right? And doesn't it involve space too?" She stuttered out, still thinking about it halfway through the statement. The Doctor nodded enthusiastically.

"Yes, exactly, perfect, err..." He said, indicating he wanted her name.

"Oh, uh, Sandra, sir," She said, putting her hand back down.

"Ah yes, Sandra, wonderful, nice name. Anyway, before I ramble about the name Sandra, I'll just tell you one thing, you forgot one thing. Time." The Doctor said, writing time and space on the board. "Now, before I go really in depth with this, I'll just tell you this isn't going to be any ordinary Physics lesson. We'll get to the normal, boring stuff later. Right now, and probably over the next few classes, I'll be explaining to you how the universe, or should I say multiverse, works."

All that statement got was long, confused, open mouthed stares. And a few mutterings of questioned sanity, of course.

"Right then, not the reaction I was expecting..." He muttered, looking slightly disappointed. "Ah well, you'll warm up once I get started. Now. Imagine this...is our universe." The Doctor drew a circle on the board. "Now, imagine this is time." He drew a ton of squiggly lines all around and inside the circle. "Because really, from a non-linear standpoint, time isn't a just progressive line of cause and effect. In reality, it's actually a big ball...of wibbly wobbly...timey wimey...stuff." Of course, this gathered many a snicker.

"But then, we also have space. Space is what's around all the wibbly wobbly timey wimey rubbish. Space is what keeps all the timey wimey there, and time is what keeps all the spacey wacey there. If you removed one, that would cause the whole universe to collapse, including all the universes around and connected to it. Then that would cause a whole domino effect that would completely destroy all of creation." The Doctor paused to catch his breath as everyone took in the information with raised eyebrows and wide eyes.

"Then that brings me to the multiverse. There isn't just one universe, oh no, there are more than you can even imagine. Every single little decision we make creates a whole 'nother parallel world, inaccessible unless you cross the void." The Doctor drew a ton of circles around the first one and then colored in the space between them. "The void is nothing. Absolutely nothing. Some people call it..." The Doctor paused, trying to find a word to replace his language. Getting fired on the first day for foul language isn't just bad, it's downright embarrassing. "Hades. Yes, Hades. It's virtually incrossable, but of course that's because no one's tried. No one actually has officially tried until hundreds of years in the future, but of course that didn't turn out well, did it..." The Doctor began to ramble, forgetting he was in front of a class of twenty five or so very confused children.

Shay facepalmed, there he was going on about time travel. She was going to be surprised if they even lasted a day. But of course, she was wrong since she barely knew the Doctor and all the tricks he has up his sleeves. She raised her hand and without waiting for him to call on her she began to speak.

"Um, Doc-Mr. Tennant, shouldn't we be getting back to the lesson?" She stuttered, forgetting the alias. Geez, her friends were right, she does have memory issues. It's quite pathetic she actually forgot that which she helped come up with. She shook it off, feeling her face got hot from embarrassment. She really got embarrassed over the littlest things as well.

"Ah yes, thank you..." The Doctor said, smirking slightly at his playing dumb. Shay smirked back.

"Shay, sir," She said, putting the slightest pitch change on 'sir', joking around. Luckily no one else noticed otherwise they would have a pretty awkward situation on their hands.

"Yes, thank you Shay." He smiled, turning back around to the board. "Right then, where were we...oh yes, the void. So that leaves us at this question. Is space and time travel possible?" The Doctor posed to the class, making everyone whisper to each other in argument.

Now it was Yasmin's turn to go ultra-nerd-force-one on everybody as she did occasionally. "Um, sir," She started, raising her hand. The Doctor nodded to her as a signal to continue. "My name is Yasmin, just to clear that up first. But about your question...I believe it is, but it would require technology so advanced that we may not have access for decades, even with how fast our technology is developing. Yet this would depend on other factors, like which way you would be traveling and how far." She said quietly, being shy, as usual.

The Doctor gave her one of his broadest smiles. "Brilliant, great observation Miss Yasmin! You are correct, it does- I mean would depend on that. Great job!" He said, catching himself mid sentence. Yasmin awkwardly shifted around, half bowing her head at one point, thanking him with an even quieter voice than before.

Just as the Doctor opened his mouth to dive into another fit of technobabble, the bell rung. "Oh, it seems our time is up for this class. Wow, that went a lot quicker than I would have expected...anyway, have a nice day, I'll see you all tomorrow!" With his parting words, everyone made a mad dash to the door, pushing to get out of the narrow door frame. Shay and Yasmin, however, hung back.

"Nice one Doctor, you slipped up a couple times with the whole 'not from this time period thing', but you did a pretty good job overall." Shay said, nodding in approval. The Doctor raised an eyebrow at her, addressing her condescending tone.

"Oh cut it with the 'higher-than-thou' stuff, bro. 'T's not cool." Yasmin said, face having a fake serious look to it as she elbowed Shay's ribcage. Shay narrowed her eyes at her friend before they both burst out into spontaneous peals of laughter, making the Doctor roll his eyes.

"Oh you two run off to your next class before you're late, people are starting to stare," He said, beginning to shoo them out of the classroom.

"You're sure you'll be fine?" Shay asked. "I mean, you are an alien and all dealing with American middle schoolers. Are you sure you can handle it?" The Doctor gave her an 'are you kidding me?' look.

"I've dealt with things far worse than a few rowdy teenagers, I'll be fine. Now run along!" He laughed, shoving them out of the classroom. The girls started running down the emptying hallways to their next class, giggling quite loudly all the way down. The Doctor let a tiny grin slip it's way onto his face, thinking of his own childhood. Before it could get painful, however, he shook it out of his head and sat back at his desk. He had a planning period next leaving him time to get cracking on the actual purpose of him being here in the first place. But what he didn't notice was the cliched shadowy figure, watching their whole conversation from down the hall way before sprinting off in the opposite direction of the girls.

"Now, let's see what information I can get today..." He muttered to no one in particular, cracking his knuckles, and leaning into his school provided computer. After logging in without the need for sonic help, he instantly started sifting through the hard drive, wondering what could be looming over them...

Okay, not too much of a cliffy ending, but I guess it was enough of one for you to want more. Right? Well, that's considering you even like the story, but whatever.

I'll post the next chapter soon!

~Mint