The single greatest effect on ...

The single greatest effect on student achievement is not race, it is not poverty - it is the effectiveness of the teacher.
The single greatest effect on student achievement is not race, it is not poverty - it is the effectiveness of the teacher.
 Harry Wong

More phrases

Being self-made is a state of mind, and once you put that mentality to work, your success will come.
 Dave East
A lot of people change for good. Some people just fall off. Just trying to progress in anything, no matter what you're doing, I feel like any progression you make... some people aren't gonna be around you that were around you.
 Dave East
There are no secrets to success. It is the result of preparation, hard work, and learning from failure.
You have to have the service mentality in the sense that you subjugate your own ego, and you subjugate a large part of your own life to really helping other people, being successful on their behalf.
 Herb Kelleher
Success consists of going from failure to failure without loss of enthusiasm.

Quotes from the same author

Half of what you will accomplish in a day will be determined before you leave home. Three quarters of what you achieve will be determined before you enter the classroom door
 Harry Wong
It is the teacher - what the teacher knows and can do - that is the most significant factor in student achievement.
 Harry Wong