"Nnnot quite. Or, at least, not what they teach first years. Physics has more maths."

"Oh. They teach maths when you're this old?"

"Some? Not a lot, most stuff I learnt by myself, but they were teaching us, like, second-degree equations and stuff."

"I don't think we have second-degree equations. Maybe in Arithmancy."

"What's Arithmancy?"

"Magic that has numbers. I think it's like second-degree equations except magic."

"That sounds like fun."

"It's an elective class, you can't take those until your third year. Maybe if you ask nicely." 

"Yeah I'll figure it out."

And at that moment a girl opens the door to their compartment. "Are you two jerks who hate muggles, too?"

"...no, I'm a muggleborn and he's nice."

"Good," she says, and drags her luggage inside, flopping onto a seat.

"Upper years? I'm sorry, hopefully the other first years won't make a fuss about it." 

"Not even upper-years! There was a first-year there, too! They were mean."

"We're not! We'll fight them for you."

"Yeah!"

She grins. "Alright!"

"So you fight the Slytherins, I'll fight the Gryffindors, your friend can fight the Hufflepuffs, and we'll just talk the Ravenclaws out of it."

"You don't think we can talk the Hufflepuffs out of it?"

"I think if you have a good idea, Ravenclaws will listen. I'm not sure how to convince a Hufflepuff of things, they're weird." 

"Show them it's best for everyone?"

"I know how I would convince a Gryffindor to do what's good, and Ravenclaw to believe what's true- what do Hufflepuffs think 'right' means?"

"I don't know, Professor Flitwick didn't get into details, but if they're about teamwork and dedication something like social goodness?"

"Maybe. I guess if they think they're doing what's best for everyone? Gryffindors care about that too, though." 

She shrugs. "Maybe when we get our Houses someone will explain better how they work."