Im in fifth grade and i need guy help?

don't say im to young or i need to focus on school because i have a 4.0 and im not a nerd because i make a goal basket or touchdown every game.....im in fifth grade and i like this girl.she knows now because my friend who's a girl told her today and i am cool with that but how would i ask here out with out my mom knowing even if she says yes or no. (this might help:my school in k-8th and my recess is like 10-15 min on game days in 15-20 lunch recess is 15-20 on game days 20-30-40 it matters...) .also how could I make her like me besides you saying make her laugh or crap like that please help.see ya