1. Accidentally call other Students Muggles (chapter title in menu shortened to fit)
She could not really be blamed for this one. Okay, maybe she could take some responsibility, but would you really blame her, when she had been raised in the wizarding world her whole life? Yes she had always been warned to be careful around Muggles, and she had most definitely been warned by her mum the morning of the first day of school, but it wasn't like she'd ever spent much time around them. She never got any real practice.
The first day of school had started out fine, but only got progressively worse from there.
Already Elizabeth, who more commonly goes by Libby, was in a sour mood. Being eleven she expected her first day of classes would be at Hogwarts, not a random Muggle public school her parents had picked out for her in Birmingham.
The other students seemed to have friends already, leaving Libby entirely isolated from them.
This had also given her a great opportunity to day dream, as she chose a seat close to the window.
It was when the teacher called on Libby that she forgot herself, momentarily, as he abruptly commanded her "Elizabeth, could you introduce yourself to the class?"
Of course Libby knew that this was not a real question, she knew probably better than any of her peers that teachers were to be listened to and respected. Especially the way they whispered to each other while he was talking. Really, they weren't making any good impressions, not that they believed they had to.
So Libby stepped forward in front of her entire class, not exactly nervous as she didn't consider speaking in front of a bunch of Muggles to be all that intimidating. "Hello everyone, I'm Elizabeth Lawson but most people just call me Libby. I used to be home-schooled, and with my brother at that, so I'm not exactly used to having Muggle classmates-"
It was just at the moment that Libby actually, literally called them that to their faces that she had immediately recognized her mistake. She was not supposed to say the Muggle part out loud! Before she was even given strange looks her cheeks turned pink and she continued as confidently as she could, now actually feeling some pressure. "Sorry about that, slip of the tongue. Anyways..."
And she continued normally after that, the strange looks disappearing. Of course afterwords three girls approached her, now more interested in the new girl.
"What was that you called us?"
"What does it mean?"
"Was it an insult? Because Mr. Smith sure didn't know what to make of it"
They had a barrage of words flowing through their mouth and Libby couldn't help but be pleased. At least her mess up had gotten her somewhere.
That, and a pointed lecture after class from Mr. Smith on what exactly is appropriate language in class.