There could be various interpretations of the'school wedge story'. It might be a story about how a wedge was found in the schoolyard and the mystery surrounding it. Was it left there by accident? Or was it part of some prank? It could also be related to a wedge in a piece of furniture in the school that led to an interesting chain of events. For instance, a wedge in a wobbly chair that made it difficult for students to sit during class, and the efforts to fix it.
I'm not sure specifically what the'school wedge story' is as it could be a very unique or local story. It might be about an incident at school involving a wedge - like something getting stuck or used as a tool in a school - related event.