Teenagers with multiple concussions can exhibit memory loss, amnesia and significantly lower grade-point averages than teenagers without head injuries.

CNN: NFL takes good first step to protect players

Those who are accepted typically have undergraduate grade-point averages of more than 3.6 and Graduate Record Examination scores exceeding 1, 200, he said.

CNN: July 24, 2012 -- Updated 0228 GMT (1028 HKT)

Because the rankings consider the grade-point averages and scores on the Law School Admissions Test, schools are pulling out the stops to make sure the highest-caliber students are applying and matriculating.

WSJ: More Law Schools Haggle on Scholarships

Over the three-year observation period, the African-American students who took part in the study had higher grade-point averages relative to multiple control groups, and the minority achievement gap overall was reduced by a dramatic 50%.

CNN: The importance of belonging

Much has been made of the fact that women are quickly outpacing men at American Universities - in numbers and in grade point averages.

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