Re: Remus/Hermione
Remus could understand why she'd been impressed with his teaching when it seemed like she was the sort to absorb any knowledge she could with a sponge. Paired with the sort of teacher he hoped he'd been, one who was overly generous with the knowledge he imparted to his students, it would have made quite an impression.
"Trial and error mostly." Remus shrugged as he shrunk the journal and put it back into his pocket. "Once you know all the pieces and what each does, -- specific rune meanings, what a particular arithmancy calculation adds to a bound spell, how the wand movements and words shape the intent -- it's easier to guess at how a slight change could modify the spell. It's a lot like learning to write, I think. You're always learning new words and phrases and ways to use the words you know to convey a new idea."
He laughed softly at an old memory of their experimentations. "And, sometimes it's just fun to play 'What will happen if we do this'."