We all know that we need to practice a skill in order to get better. However it is important to remember that practice isn't just doing something again and again, it requires you to focus on the task at hand. To be concentrating on getting better.
Have a look at this video.
What does it teach you about the power of concentration?
How has your concentration been in school this week?
Can you think of the last time you concentrated? When was it? What were you doing? What did it feel like?