The class is surprised when Mrs. Matthews says that Rebecca will tell them about Buddy because it deviates from the usual teacher-led dynamic, creating curiosity about Rebecca's role and connection to Buddy.
The class is surprised when Mrs. Matthews mentions that Rebecca will tell them about Buddy because it implies an unexpected shift in roles or responsibilities. Typically, the teacher or authoritative figure is the one providing information or leading discussions. In this case, the students likely anticipated Mrs. Matthews to share details about Buddy.
The sudden mention of Rebecca taking on this role creates a surprise element, raising questions about why she specifically would be the one to provide information on Buddy. It introduces a curiosity and unexpected dynamic in the classroom, prompting the students to wonder about Rebecca's connection to Buddy and why she has been chosen to share details about him.