Here's what I know about the boys in school...
Adam was from a good school, but as he was a bad student he was kicked out from this school and then he went to Mount Temple, and I remember an interview with them, where Bono says he had this kind of blond afro hair, and that he'd never take the sunglasses off, and that he'd walk the school hall down and think he was the coolest guy in school, and Bono said that if it wasn't by the hair he probably was the coolest guy. But, he was kicked out from Mount Temple when he walked naked in the courtyard of the school, and then after that he started to like "managing" the band.
Before Bono go to Mount Temple he used to skip classes, and walk by Dublin streets, (it was because of the religion he didn't like school) and then when Mount Temple opened, he went there, and kinda became a good student lol. And I remember once seeing something about he getting in fights, never starting them, but finishing. And after sometime he became romantic to get girls in school, *so sweet!!!* lol
And all I know about Edge in school, was that he was a really shy boy, but he was notest by Bono once, (by this interview I have), and he used to get good grades, but in the band first meetings, he didn't use to talk much, or give any sugestions much. So, as he was a lot shy I don't think he was popular, I think he was in the middle.
And about Larry, I also know he was shy, but I don't know anything about his grades...
I don't think that any of the boys were a loser, I think they were all in the middle, except for Adam that must be reminded by the others students for his walking naked lol
That's all I know