The next day, Jack skipped breakfast, he didn't really need to eat anyway. Instead he was preparing for his first class. To his surprise there were a number of people wanting to do Physical Combat and Free Flying.

Despite popular belief, Jack Frost was a capable teacher. He had actually taught a number of his early believers Defensive Combat. Sadly some of them had had to use it. But it made him glad that they had been able to defend themselves.

The bell rang.

Let's see his first class was third years. The youngest he would be taking. Jack also noticed that Harry Potter's name appeared on the register. There were about ten in all, and even number that was good, Slytherins and Gryffindors, well this should be interesting.

There was a tentative knock on the classroom door, of course, posh English school, of course they lined up outside.

Sighing slightly Jack went and opened the door, admitting his first students.

There weren't any desks in the room, instead along each wall were lockers leaving the floor bare, aside from the mats that Jack had laid down for practice.

"Good morning. You can put your bags in a locker. In there you should find some gym clothes..."

Jack held up a hand forestalling any complaints from the platinum blonde Slytherin.

"There the same for everybody, and Physical Combat isn't advisable in robes. There are changing rooms through those doors, boys on the left, girls on the right."

Once they had all changed into the T-Shirts and pants that he had arranged for them, Jack called out the register.

"Brown..."

"Here." The fit of giggles that followed this proclamation caused Jack to frown slightly. Why did he have to get a giggler? Check that, there were at least three or four. Great, just great.

The rest of the register was called, Jack studiously ignoring the giggles and looks.

"Potter?"

"Here, sir."

That one made Jack look up, okay of all the many things he expected to be called 'sir' had never been one of them.

"Please don't call me 'sir', it makes me feel old. Granger..."

Jack grinned at the dark haired boy as the girl on his left answered.

"Goyle?"

Well that grunt will just have to do a yes then.

"Malfoy"

"Here...Sir." The sneer behind those two words was quite extraordinary, and if Jack wasn't so busy keeping his cold in check, he would have been mildly impressed. As it was he was aware that the room was now substantially cooler than it had been.

The class had noticed too, it seemed. There were a few wide eyes and Malfoy's (of course he was the blonde from earlier, who else could it be?) expression had gone very quickly from disdain to fear.

Jack may not have liked the kid, but he could not allow fear. Reining in the cold again, with a slight grimace Jack finished the register.

"Weasley?"

"Here...uh"

The redhead on Potter's right spoke up and Jack gave him an encouraging smile, raising his eyebrows before answering the unspoken question.

"Feel free to call me Frost, for now."

Somehow he didn't feel ready for the reaction his first name would get. His believers had grown to rival North's, especially over the past century.

The boy, Ronald (Jack inwardly winced for the guy) nodded in acknowledgement.

"Right, start with a warm up I think, then I'll start you on some basic katas."

"Um...Frost?" The Granger girl had her hand raised, Jack knew instantly that she was a bookworm.

"Yes?"

"Um...but, what exactly is Free Flying? I mean it sounded interesting, but none of us know what it is."

Jack grinned, oh how he had looked forward to this.

"Free Flying, is flying without a broom.

"But that isn't possible." Ronald, the redhead, scoffed.

"Well that's unfortunate considering I'm here to teach it." Jack couldn't help himself, he had to make a few sarcastic comments, though he did soften it with a smile.

Jack flew all the time, and he had been assured by Dumbledore that it was possible for anything with magic to learn it. It was part of the wandless magic. And that is what he told his class.

Before giving them an example and jumping into the air, and staying there.