This document discusses key aspects of hockey including positions played, common penalties, and the typical progression levels for youth hockey leagues culminating in professional leagues. It lists defense, forward, and goalie as the main positions. It also names hooking, tripping, high sticking, roughing, and cross checking as common penalties. Finally, it outlines the pyramid of youth hockey leagues from mites and pee wee up through juniors/college and into semi-pro and professional levels.