Zero to Hero (from Disney's Hercules)
Annabeth watched as Percy tried to teach the newer campers how to unarm their opponent. He was actually a good teacher, when he wasn't distracted.
She couldn't believe how much he'd changed over the last five years. He'd shown up at the Big House that one stormy night, short and scrawny, barely able to hold his own when fighting the Minotaur. Now, he was as tall as she was, fairly muscular (gods, that was an understatement) and had fought at least 4 Titans.
In short, Annabeth thought, he went from being a zero to a hero. Thank gods for that.
A/N: This song's brought to you by Eleos! Thanks, Eleos, not only for the suggestion, but for being an awesome friend/cowriter person. Make sure you review, everyone!