"Better looking" students receive better grades in school

TIME posted an article address the study that better looking students have higher GPAs and succeed more in high school and go to college. 

Now as a high school student, after reading this I actually understand and see where this is true. Of course not always is it like this but it is definitely true that more attractive male and females receive more attention from teachers than "non-attractive" students. This could easily cause a difference in self-esteem and happiness which has some sort of affect on your grades. Students with a better relationship with the teacher are more likely to ask questions or absorb more information, and take extra credit classes, which results in better GPAs. It's sad to say I believe this true in our society, not just school. I've seen it in some of my classes in my 4 years of high school.

http://healthland.time.com/2013/12/10/teachers-give-better-grades-to-more-attractive-students-study/?iid=hl-main-lead