Teacher Bias?

Here's an interesting summary of a study that was just brought to my attention by a recent NYTimes article--it's a better summary than provided in the Times. It concerns, among other things, possible teacher bias and especially the role of physical attractiveness (less important than we may have thought), personality (most important for female students), and grooming (most important for male students) as predictors of grades in high school--and perhaps in college and in the organization.