This got me reading, and this article mentions student grades being affected by concussion:
...who is enrolled in honors courses, is concussed, he suffers from headaches and a lack of concentration. "It feels like you have a haze over you, a fog, kind of," he said, adding that his grade-point average dipped from about a 3.57 to a 2.71 in the fall when he had trouble focusing after his football concussion.
"He's in all really, really intense classes, so concussions have much more effect there than on the field," said his mother...
Luckily, the focus on professional athletes denying concussions has raised awareness at the lower, youth, levels (ref), or so says a prominent sports agent:
Steinberg, who helped organize the summit along with the Sports Concussion Institute, is sponsoring a California program that will institute so-called "baseline testing" in 1,400 high schools, where athletes are given a cognitive exam that can be repeated after injuries to measure brain impairment.or, as David Hovda so aptly stated:
"I don't know what's so mild about mild traumatic brain injury," said David Hovda, director of the UCLA Brain Injury Research Center.
