Mikey grinned. "That's good. In my experience, people who're the other way around tend to make pretty boring explainers." It became all about imparting key facts and recommending heavy texts. Enthusiasm was what made people sit up and listen, then get excited themselves.
His mouth almost dropped open when Z described what she'd been doing during the war and since. "Wow, I feel like I should apologise. I had no idea you had studied at that level." There were a fair few students who had some NEWT level knowledge, but he didn't know any that had already done equivalent tests and then gone on and studied further. "I presume, then, that you're just here because of red tape?" He could imagine it being tricky to amalgamate school records from two different countries. "Or, I'm sorry, maybe that's a bit presumptuous." It might well be that there were subjects Z could only learn at Hogwarts or she wanted extra tuition.