When school starts each year, the most important question on the minds of parents and children is, Who will my teacher be? The concern is well founded. Researchers have discovered that school's deepest influence on learning depends on the quality of the teacher. Students lucky enough to have teachers who know their content and how to teach it well achieve more. And the effects of a very good (or very poor) teacher last beyond a single year, influencing a student's learning for years. Put simply, expert teachers are the most fundamental resource for improving education.
This lesson has been well learned...