http://www.latimes.com/opinion/editorials/la-ed-teacher-evaluations-value-added-study-usc-u--20140514-story.html
Youtube video of the Study-- Relationship of Test Scores and Teacher Quality: https://www.youtube.com/watch?v=XFgUmSVNjzU&feature=youtu.be
Youtube video of the Study-- Relationship of Test Scores and Teacher Quality: https://www.youtube.com/watch?v=XFgUmSVNjzU&feature=youtu.be