Could headaches be causing the "fog"? If my 13 year old son were in school I think he might have trouble getting work turned in on time during weeks when there are frequent weather changes because of frequent migraine headaches that run in my family. Even when medication takes away most of the pain, it does not take away the "brain fog" and the really tired feeling we get along with the headaches. I know it affects our processing speed and I don't need a test to tell me this. My son is easily able to make up for those times of brain fog because he still learns very quickly when he doesn't have a headache.
