Getting attention
Some first graders love to come in first because of the attention it nets them from grown-ups. After all, tattling on another kid who's talking makes a child feel uber-important, especially when a teacher seems pleased with the result. When your little one is the cream of the crop, you might give way more attention than when he comes out somewhere in the middle. Of course, that means you're comparing your kid to others in the class, when he should really strive to compete against himself instead.