"I'm a schoolteacher," still sounds strange to say, even three years and change into it. "Not any subject relevant to space travel." He pauses there, unsure how to really explain his interests as 'everything', because it's not really true, but sort of covers it.

He settles on, "I like knowing how the world works. Are you a university student?"

University, college, is sort of fascinating as a concept to him. As a very small child before the idea of Hogwarts overtook his entire consciousness, he thought about the half-dozen prestigious muggle universities he might attend. He'd never admit to to anyone from home but part of him would still like to go.