Lastly, here's the NY Times cover story from last Friday about it:

Big Study Links Good Teachers to Lasting Gain

By ANNIE LOWREY

Published: January 6, 2012

http://www.nytimes.com/2012/01/06/education/big-study-links-good-teachers-to-lasting-gain.html

WASHINGTON — Elementary- and middle-school teachers who help raise their students' standardized-test scores seem to have a wide-ranging, lasting positive effect on those students' lives beyond academics, including lower teenage-pregnancy rates and greater college matriculation and adult earnings, according to a new study that tracked 2.5 million students over 20 years.