Yep, that's a good objective description of what it takes to succeed: goals, impulse control, discipline. However, creativity within those parameters is also needed.
To my mind, the results also vindicate an emerging model for low-income students. Over the past decade, dozens of charter and independent schools, like Promise Academy, have become no excuses schools. The basic theory is that middle-class kids enter adolescence with certain working models in their heads: what I can achieve; how to control impulses; how to work hard. Many kids from poorer, disorganized homes don’t have these internalized models. The schools create a disciplined, orderly and demanding counterculture to inculcate middle-class values.
David Brooks on education
No profanes - sacred