Jess shook his head and stood up as tall as he could. "It's happened," he said simply, before deciding that he really should explain. "Students, listen," he said, watching as they all stopped practicing, talking, and generally making noise.
"My name is Jess Potter. I am the Leader of the Order of the Phoenix," he said, pausing for effect, he was, after all, deep down a showman. "I've just been interrogated extensively, and the whereabouts of the Order's HQ has been betrayed. I've come to ask for your help." He said, swallowing his pride.
"Soon, quite soon, the Death Eaters will march on my house, a location i will reveal to you if i can obtain your loyalty. Before any of you make your decision, i must tell you something. The Death Eaters will not stop because you are children, it might make them try harder, just for the fun of it. If we do this, i will set up a link between the HQ and this room that only you can enter." he told them, "And i would expect that if you're losing, you fled and protected yourself, i don't want any lives on my conscience." he told them seriously