A new study by Professor Jonah Rockoff and colleagues Raj Chetty and John N. Friedman of Harvard indicates that good elementary school teachers have a positive effect on students in the long-term. The study, which tracked 2.5 million students over 20 years, shows that teachers who raise standardized test scores impact their students beyond the classroom — their students are more likelly to go to college and less likely to be teenage mothers.
