If you're a worrier, you might then worry that this will cause your son to fail the class, which will then impair him from getting into college.
It is not to be forgotten, what Commineus observeth of his first master Duke Charles the Hardy; namely, mat he would communicate his secrets with none; and least of all, those secrets, which troubled him most Whereupon he goeth on, and saith, that towards his latter time that closeness did impair and a little perish his understanding.
Stress causes the body to release cortisol, which can impair memory and has been found to shrink the memory centers in the brain.