I was the same way after my head injury, I was an A-B honor roll student and then it went to D's and F's. I couldn't concentrate, everything would get fuzzy, one time the teacher called on me and I couldn't do a simple adding question, I screamed at him, and ran out of the room.

I had to re-learn everything all over again. It was hard but I graduated on time.......now the hard part is when I get to college.