I think this speech from President of the United States Obama is very inspiring,it's really necessary to tell my child when he reach school age,
and I also hope he have the ability to go against heaven and change his life.Here is the speech.

I know a lot of you have challenges in your lives right now,they can make it hard to focus on your school work,I get it know what it's like.
My father left my family when I was 2 years old and I was raised by a single mom who had to work and struggled at times to pay the bills 
and wasn't always able to give us the things that other kids had,my wife our first lady Michelle Obama,she has a similar story.Neither of her parents 
had gone to college and they didn't have a lot of money,but they worked hard and she worked hard too,so that she could go to the best schools in this country,
but some of you might not have those advantages,maybe you don't have adults in your life who can give you the support that you need,maybe someone in your family 
has lost their job and there's not enough money to go around,maybe you live in a neighborhood where you don't feel safe or have friends who are pressuring you to do things that you know aren't right,
but at the end of the day,the circumstances of your life what you look like where you come from,how much money you have,what you've got going on at home,
none of that is an excuse for neglecting your homework or having a bad attitude in school that's no excuse for talking back to your teacher or cutting class or dropping out of school,there is no excuse for not trying.
Where you are right now doesn't have to determine where you'll end up,no one's written your destiny for you,you make your own future.