* Scrooge's disdain for children: Throughout the story, Scrooge displays a clear aversion to children, even calling them "unnecessary" and "unproductive." This attitude might stem from a difficult or unhappy school experience, perhaps marked by harsh discipline or a lack of care.
* Scrooge's memories of the "schoolmaster": While the story doesn't detail his school years, Scrooge mentions the schoolmaster in relation to his childhood friend, Fezziwig. This suggests that he had some sort of memory, though perhaps not a pleasant one, of the educational environment he was exposed to.
* Scrooge's character development: The overall arc of Scrooge's transformation suggests that he was shaped by negative experiences in his youth. His transformation from a miserly, isolated man into someone capable of generosity and empathy hints at the possibility that he was deprived of warmth and affection during his formative years, perhaps at school.
It's worth noting that Dickens himself attended a school with harsh discipline, and this experience likely influenced his portrayal of education in his work. While there's no clear picture of Scrooge's school experience, it's safe to assume that it played a role in shaping his character and his jaded view of the world.