Susan was doing her homework. And doing it rather well too, she thought complacently, drawing a line under the theorem that she had just proved. "I quite like geometry," she thought. "If you have a decent point on your pencil. And algebra's not bad. But I don't like arithmetic-"
From SUSAN PULLS THE STRINGS, Chapter 1, Changes. In this opening paragraph of the very first book in the series, Susan seems to be a little bit more dedicated to her school work at her school in Glasgow than she proves to be at St. Ronan's the next year!