if you ever go over stuff again at some point, I noticed two small errors/typos you could fix.
P1:
"HEY, DID YOU HEARD? WE'RE GETTING..." -> correct would be either "did you hear" or "have you heard" here.
P3:
"THE PREVIOU BOY, YAMADA-KUN..." -> "S" missing from "PREVIOUS"
Also, for dialogues, I would stick to full capitalized text. You had some bubbles with normal text mixed in. They stick out in a weird way, at least to me. But that's just my preference when it comes to reading.