Outside of the courtyard, everyone waits for Coach Collins to come out.

Coach Collins: Okay, everyone. Are we all here?

Nino: Think so, sir.

Coach Collins: Hmm... let me just roll before we go to the pool for our swim test. If I call your name, say here or present. Adrien Agreste?

Adrien: Here.

Coach Collins: Taylor Andrews?

Taylor: Present.

Coach Collins: James Bentley?

James: Here.

Coach Collins: Chloe Bourgeois?

Chloe: Here. *She looked through her phone. *

Coach Collins: Ivan Bruel?

Ivan: Here.

Coach Collins: Sage Carter?

Sage: Here.

Coach Collins: Alya Cesaire?

Alya: Here.

Coach Collins: Juleka Couffaine?

Juleka: here.

Coach Collins: Amelia Davis?

Amelia: Here.

Coach Collins: Marinette Dupain-Cheng?

Marinette: Here.

Coach Collins: McKenzie Evans?

McKenzie: Present, Coach Collins.

Coach Collins: Sean Garcia?

Sean: Here.

Coach Collins: Mylene Harpele?

Mylene: Present.

Coach Collins: Mark Harrison?

Mark: Gabriel Johnson?

Gabriel: Here.

Coach Collins: Carlie Jones-Hall?

Carlie: Present.

Coach Collins: Max Kante?

Max: Present.

Coach Collins: Alix Kubdel?

Alix: Here.

Coach Collins: Nathaniel Kurtzburg?

Nathaniel: Here.

Coach Collins: Nino Lahiffe?

Nino: Here.

Coach Collins: Rose Lavillant?

Rose: Here.

Coach Collins: Samantha LeBlanc?

Samantha: Present, monsieur.

Coach Collins: Le Chien Kim?

Kim: Here.

Coach Collins: Sabrina Raincompriz?

Sabrina: Here.

Coach Collins: And Aiden Reid?

Aiden: Here.

Coach Collins: Okay. We got a full class. Let's go to our bus and head to the community pool. *They all leave the school and get on the bus too. Sabrina walked past Chloe, she sat next to Sage, Chloe scowled and looked ahead. *

Chloe: (You're gonna regret not being friends with me, Sabrina. Just wait.)

Coach Collins: Okay. Take us to the pool, please? *The bus driver nodded and drove to the pool. In the bakery, Sabine served one more customer for the day. *

Sabine: Here you go, Pierre. I hope you enjoy the macarons.

Pierre: Merci, Sabine. *He takes the box of macarons and leaves the bakery. *

Tom: We're done already?

Sabine: For now.

Tom: Good. We'll have to talk about advertisements for more hire help.

Sabine: Now, how should we set it up?

Tom: The bakery hours are 8 am-4 pm. And in case we need to do some delivery routes.

Sabine: True. Good thing we have the bakery phone number in case anyone wants anything delivered.

Tom: We still have those applications, right?

Sabine: Yes. *She goes to the drawer and pulls out the applications. * Here they are.

Tom: Okay, good. What time is it?

Sabine: 1:15.

Tom: Whoever comes here, we'll offer anyone a job application to work here.

Sabine: That'll work. For now, let's just relax until 1:45.

Tom: Okay. *Sabine put the applications down, walked up to the door, and posted the sign that said, "Be back in 30 minutes." Then they head to their house, and Tibbles and Angel come running towards them. *

Sabine: Yes, yes. Hello. *She picked up Angel and she licked her face, Sabine grinned. Tom rubbed Tibbles' head and Tibbles licked his hand. *

Tom: We'll feed you guys and take you for a walk.

Sabine: Tom, at 2:15, do you mind getting Timmy from school?

Tom: Okay. *He washed his hands and started prepping their lunches. *

In the Conservatoire de Bordeaux Jacques Thibaud, in Mr. Martin's class, he teaches physics.

Mr. Martin: So, who knows the answer to this? *They looked at the question that says, "What is the theory of relativity?" *No one didn't raise their hands for the answer. But then, Nick raised his hand. * Yes, Nick?

Nick: General relativity is physicist Albert Einstein's understanding of how gravity affects the fabric of space-time.

Mr. Martin: Good answer, Nick. So, we know that Albert Einstein was a famous Physicist, but this also holds that what we perceive as the force of gravity arises from the curvature of space and time. The scientist proposed that objects such as the sun and the Earth change this geometry.

Abby: How do you know about that?

Nick: I admire Einstein. It's not that hard.

Mr. Martin: We're gonna learn more about the General Reality, so everyone please get out a notebook and a pencil and take some notes. *They all did what they said and listened to Mr. Martin's lectures. * The first slide is about Einstein's General Theory of Relativity. Albert Einstein's general theory of relativity is one of the towering achievements of 20th-century physics. Published in 1916, it explains that what we perceive as the force of gravity and the subsequent motion of the planets arises from the curvature of space and time. Can someone tell me how Albert Einstein discovered the force of gravity? *Shohei raised his hand. * Yes, Shohei?

Shohei: He got help from mathematician Marcel Grossmann, an old friend who shared his notes when a young Einstein skipped class. Their math, laid down in 10 equations, explained how gravity could move around objects via a warped reality, accelerating without ever feeling any mysterious Newtonian forces.

Haru: Whaaaaa?

Mr. Martin: Good response. Next slide. *He goes to the next slide. * Frames of reference. To make any measurements involving motion in space and time, we have to define our frame of reference. This is the area that we are making all our measurements relative to. For example, if we measure the speed of a train as it passes by a platform, then the platform (and hence the Earth) is the frame of reference, and the speed of the train is measured relative to this frame. This gets complicated when 2 observers are moving relative to each other. Each can claim to have their frame of reference. Hope you all got it down before we move on to the next slide.

Miyu: Hold on, I'm almost done. *She writes down the last bit of the notes. * Okay, I'm done.

Mr. Martin: Okay. Next slide.

Kathrin: This is gonna be boring.

Rachel: Totally. *Then, Mr. Martin clicked on the next slide. * The next slide is called Inertial Frames of Reference. This is mostly about A frame of reference that is stationary or moving at a steady speed in a straight line is called an inertial frame of reference. Einstein's Special Theory of Relativity only applies to inertial frames of reference. Einstein's 2 postulates for Special Relativity are: 1. The speed of light is the same for all freely moving observers. And 2. the laws of Physics are the same in all inertial frames of reference. You can copy down the parenthesis from the bottom. *Inside the community pool, Mr. Collins sees the kids coming out all in their swimwear. *

Amelia: I don't even know why we have to take this swim test.

Samantha: Because it's part of our gym requirement.

Amelia: Well, they shouldn't even allow it. Some of us don't even know how to swim.

Chloe: So, you're saying you don't know how to swim? Hahahaha.

Amelia: I do. The question is: do you? Or wait, are you allergic to water and you can't even admit it?

Chloe: As if. I shower every day. Which is why I smell way better than you. *Amelia stuck her tongue out at her. * Plus, why should I care to even do this swim test? It's just pointless and an excuse to even get wet.

Alya: (Whispering to Marinette): If she was the Witch, she'd melt.

Chloe: Sabrina, back me up.

Sabrina: No.

Chloe: What? Why don't you agree with me? *Sabrina didn't say anything, Chloe groaned angrily. *

Amelia: Looks like your "friend" isn't backing you up this time. Sucks to be you, doesn't it? *Chloe scowled and looked away from them. *

Mr. Collins: Alright, everyone. Are we ready to start the swim test? *Everyone answered yes to Coach Collins. *Okay. Since there are 5 lanes, we'll do 5 students at a time so we can get done quickly and head back to school. Sounds like a plan, huh? *Everyone agreed to that. *

Chloe: Why do I have to do this?

Alya: Oh, I don't know. Maybe because it's an academic requirement. And you'll fail if you don't do it?

Chloe: Nobody asked you, loser. This is ridiculous utterly ridiculous!

Coach Collins: Is there a problem over there?

Sabrina: Chloe doesn't wanna cooperate and accept to do the swim test.

Chloe: Yes. I do. And I'll tell my father to cancel this stupid swim test. It's a waste of time and just an excuse to get wet. *She gets her phone out and calls her dad, but Coach Collins takes the phone from her and ends the call. * Hey!

Coach Collins: No calling your father. You're gonna do the swim test whether you like it or not. Now get to your post, you're up first among 4 others.

Chloe: Ugh! No fair! *She folded her arms in anger. *

Coach Collins: Okay, 5 people at a time so, Adrien, Taylor, James, Chloe, and Ivan, you're up first. Head to your stands. *They walked to their posts and waited. * The position you wanna do when you dive in the pool is to crouch close to the pool and glide into the water, then start swimming to the end and back. The total of laps you'll do is 2, just back and forth 2 times. Okay? *They answered yes to Coach Collins, Chloe rolled her eyes and scowled. * Okay, are we ready? Dive position. *They do their dive position, but not Chloe. * Chloe, get into the diving position.

Chloe: This is pointless! I didn't sign up for this.

Coach Collins: Do you wanna fail gym class?

Chloe: No.

Coach Collins: Then get into dive position, now! *Chloe groaned and got into a diving position. * Okay. On your mark, get set, dive! *They dive into the water and start swimming forward, then swim back to the front, and swim back. * And you're done. Good job. *He checked them off and they got out of the pool and dried off. *

Chloe: Waste of time, this is stupid. *She dries herself off and has the towel around her neck. *

Coach Collins: Okay, the next 5 are: Sage, Alya, Juleka, Amelia, and Marinette.

Chloe: Hey, Dupain-Cheng. Don't slip. *She chuckled, Marinette rolled her eyes and ignored Chloe's remark. *

Coach Collins: Get into the diving position. On my mark, swim. *They get into a diving position. * On your mark, get set, dive! *They dive into the water and start swimming forward, stop and swim back, and swim forward again. * Good job. You 5 are done. *He checked them off and they got out of the pool and dried off. *

Alya: Easy.

Marinette: It was okay. *They grab a towel and dry off. *

Coach Collins: Next 5: McKenzie, Sean, Mylene, Mark, and Gabriel. *They go to the edge and get ready to dive. * Okay. Diving position. *They get into a diving position. * On your mark, get set, dive! *They dive into the water and swim forward, stop, swim back to the front, and swim back. * And stop! You're good. *He checked them off and they got out of the pool. *

Sage: That was easy. Thank you for summer swimming lessons. *He dries his hair off with a towel, Ivan handed Mylene a towel and she dries off too. *

Coach Collins: Next 5: Gabriel, Carlie, Max, Alix, and Nathaniel. Onto the edge, please? We're almost done. *They walked to the edge of the pool and spread out. * Assume the diving position. *They get into a diving position. * On your mark, get set, dive! *They dived into the pool and swam forward, stopped, swam back to the front, stopped, and swam back forward and stopped. * Good. You're all good. *He marked them off and they got out of the pool and dried off. *

Marinette: Good thing we're almost done.

Alya: Yeah.

Coach Collins: The next 5 up are Nino, Rose, Samantha, Kim, and Sabrina. *They go to the edge of the pool and spread out too. *

Chloe: Ugh. So boring.

Coach Collins: Assume the diving position. *They get into a diving position. *

Kim: This is gonna be cool.

Coach Collins: No showing off, Kim. We know you're good at swimming, no need to prove it.

Kim: No worries, coach.

Coach Collins: On your mark, get set, dive! *They dived into the water and swam forward, stopped, swam back, stopped, and swam back straight. * And stop. You're good. Out of the pool. *He checked them out and they got out of the pool. * Aiden, you're last.

Aiden: Okay. *He gets up and walks to the edge of the pool. *

Coach Collins: Assume the diving position. *Aiden gets into the diving position. *

Aiden: (Here goes).

Coach Collins: On your mark, get set, dive! *He dives into the pool and swims forward, stops, swims back to the front, and swims straight ahead and stops. *  Good, Aiden.

Aiden: Phew. *He gets out of the pool and dries off. *

Coach Collins: You all did well on your swim test. We have plenty of time to get back to school. So finish up drying off, change back into your regular clothes, and meet me outside of the bus. *They all start moving to their changing rooms and change out while Coach Collins heads outside and stands by the bus. *

In Marinette's house, after the dogs have been walked and Tom and Sabine have lunch, they head back to work in the bakery.

Tom: Okay, kids should be out of school soon. *He put oven mitts on and put the tray of muffins in the oven along with the cookies. Then, he rolled out the dough for the custard pastry Danish. Up front, Sabine removed the sign and headed back to the counter, waiting for some customers to come in. Then, 4 walked inside the bakery. *

Sabine: Ahh, alright. Let's continue. *She starts taking orders from the customers while Tom bakes the pastries and sweets. *

Tom: (Remember 2:15 get Timmy from school.) *In Mr. Martin's class, he's going over the last bit of notes on Physics. *

Mr. Martin: Okay. So, the last 2 slides are left of our lesson. This slide is about Black Holes. *He showed them the slide on Black Holes. * Black holes distort spacetime so much that the laws of physics break down at the event horizon. Black holes create "holes" in the fabric of spacetime.

Greg: Like the spacetime continuum?

Mr. Martin: Not even close, Greg. Here's how they're formed. Primordial black holes are thought to have formed in the early universe, soon after the Big Bang. Stellar black holes form when the center of a very massive star collapses in upon itself. One current theory is that wormholes could exist between black holes that could in theory provide a mechanism to travel to other regions of the Universe instantaneously. Do you all understand black holes now? *Some answered yes to Mr. Martin. * Good. Glad we're all on the same page. Now to the last slide. *He flips to the last slide of the lesson. * This is our last slide on Further Reading on the Theory of Relativity. There's a book called A Brief History of Time by Stephen Hawking if any of you are familiar with him. *Kekio raised her hand. * Yes, Keiko?

Keiko: I heard about Stephen Hawking. I got one of his books right here. *She showed Mr.