Aging thing Spiderman Far From Home *SPOILERS*
So I'm guessing Peter Parker's entire class got dusted, otherwise some would be five years older than the others, judging by what we've seen in the trailer.
shareMaybe about half of the class got dusted? The survivors would have finished the school already.
shareBut we do see most of them in the final scene of the trailer and they all look the same age as they did in HC.
shareMaybe everyone just had a 5 years school holiday!
shareEven with a 10 year school holiday Justice League would barely break even :D
On topic, aging thing is much more difficult for youngsters than for the adults. For instance we did see aunt May in the SM:FFH trailer but who knows if she got dusted? It's easy to say "He or she is holding well for his /her age". Kids can't pull the same thing, I mean compare AntMan's daughter from AM&W with her in EG.
The only feasible explanation is they ALL got dusted.