““the “10,000 hour rule.” The rule states that ten thousand hours of practice is required to achieve the level of world class mastery in anything. It seems that it takes the brain this long to assimilate all that it needs to know to achieve true mastery. Time on task is the number one predictor of academic success also. Those at the top of the success list spend the most time on task or goals. Those at the bottom spend the least amount of time on task. It’s that simple. Again, persistence is the difference that makes a difference.””