A possible concise summary is:
Jeffy fakes his death to avoid showing his parents his report card with all F's. His friends call his dad and pretend to be a cop who tells him that Jeffy died in a plane crash. Jeffy stays with Cody, who has weird parents. Jeffy's dad finds out it was a prank and pretends to have a funeral for Jeffy. Jeffy reveals himself and shows his report card. His dad gets angry and threatens to punish him.
Some possible facts extracted from the text are:
1. Jeffy is getting his report card today and he is afraid of his father's reaction.
2. Jeffy's report card has all F's.
3. Jeffy and his friends decide to fake his death by calling his father and pretending to be an officer.
4. Jeffy stays at Cody's house for one night and has to eat on the floor.
5. Jeffy's parents find out that he is alive and they are angry at him for faking his death.