Here's the Columbia Uni study covering 18 million in statistical tracking over 20 years, proving how value-added teachers (those who give more than just knowledge and whose students show greater improvement than others in the curve) can significantly change the outcome in the lives of young people - their income, social status, occupation.
Click here: Columbia's 20-year study on Value-Added Education
Here's an excerpt from the Financial Times and their write-up on the study:
"The notion that a teacher can make a difference in an individual’s life is a familiar one, but now academics have discovered that the impact a good teacher can have goes much further than first realised.
According to professors from Columbia Business School and Harvard University a good teacher can affect students’ entire lives, from where they live, to how much they earn and even the age at which they have children."
