>>715593Here's a quick thing I just put together now, with my general idea of Hui Feng's class.
The other 4th graders would make up the second 4th grade class, besides Rodney who doesn't attend classes, Blenny who only sometimes shows up when he feels like it, and Gretel who doesn't go to classes but does hang around the school sometimes with Hansel.
Of course with a school trip episode there is nothing stopping both the classes from going, I remember going on school trips as a kid that had multiple classes attending.