Final answer:
The interaction reveals miscommunication and misunderstanding about Laurie's behavior, as his mother doesn't realize he is describing his own actions when talking about 'Charles.'
Step-by-step explanation:
The interaction between Laurie's mother and his teacher in the story "Charles" reveals a miscommunication and misunderstanding about Laurie's behavior in school. The irony is that Laurie's mother is unaware that the mischievous actions she hears about from Laurie, which are attributed to a nonexistent boy named Charles, are actually Laurie's own doings. Laurie's mother only learns the truth during a parent-teacher meeting, leading to a surprised and enlightening moment for her.