She walks alongside her housemates. When they get there she breaks into a wide grin at the number of books. It isn't that much more than Flourish and Blotts but it's bigger than library at her primary school and she can come here and read whenever she wants.

Only up until 8PM and she had better be very quiet. Madam Pince is not very tolerant of noise in her library.

She'll whisper then. How is the library organized? If it's not obvious do any of her dormmates know?

It has many labelled sections, including an invisibility section, a dragon section, a reference section, a legal section, a restricted section...

Invisibility sounds intriguing, does it have a more general charms section?

Not per se but the reference section might have a list of charms-related sections.

She doesn't need to focus on classwork just yet, she'll go browse the invisibility section.

Invisibility section! There are many books, including stuff about charms, potions, cloaks, curses, the history of invisibility, 107 Uses Of Invisibility You Almost Certainly Have Not Thought Of (And Frankly Half Of Them Are Not All That Useful Anyway)...

She'll peruse a couple books. Are her dorm-mates similarly engaged?

Variously!

She'll entertain herself with books until one of her classmates addresses her or it's time for their next class.

Lunch happens before class does.

She'll accompany her dorm mates to lunch.

Dayo is already there, sitting at her table and talking in a small group that seems to include a begrudging Draco Malfoy and his less begrudging minions.

She'll smile and wave if Dayo notices her. She'll eat and try to get to know her dorm-mates some more.

"So you never did tell us what muggle life was like," Mandy says. "I'm a half-blood but it just wasn't the same."

"I haven't spent quite enough time in the magical parts of the world to have a good comparison. Kids go to school where we learn about math, science, history and english. Adults work at various jobs like teaching, selling people stuff, or making things. Sometimes people go out to eat. Muggles don't have the floo or apparition so instead they have cars and trains and sometimes planes to get where they need to go. Muggles also use pens and pencils instead of quills and paper instead of parchment. Sometimes we use computer or typewriters instead of either."

"...can you back up and explain all of those?" asks Sue Li.

"Sure, I'll start with school. Math is a class where you learn to manipulate numbers. The simple maths we learned up to how old I am now were called arithmetic and algebra. Arithmetic is about doing addition, subtraction, multiplication and division. Algebra is about puzzling out how to rearrange a math problem so that you can solve it with arithmetic. I can try to give examples if those words aren't familiar."

"I could've told you that," Mandy says, sounding a bit put out.

"But you didn't," Padma points out.

"It sounds like each of you has a different level of background, I can keep going with the level of detail I'm currently trying for or I could get more or less detailed. I'd be happy to provide more clarification to any of you later if the whole group doesn't need to hear it."

"I don't care about the school," Mandy puts in, "I'm interested in the whole being the girl-who-lived amongst muggles thing."

"I wasn't though. The muggles don't know anything about the war our parents fought or observed. If you're asking how I came to be living with them I was living with my mother's sister."

"Why though? And how do they not know?"

"I'm told Dumbledore was involved in me being placed there. I don't know why I was placed there as opposed to with other friends of my family but it sounds as if a lot of people died in the war including some people who were close to my parents. As for why my relatives don't know more about the war, magic makes them uncomfortable and they aren't particularly curious people by disposition."