I always did well in school. Although I did not go straight to university, by studying part-time for seven years after I started work, I graduated with a second class honours degree in Industrial Chemistry. Had I not left a cult, got divorced. lost two grandparents and had a very painful relationship break-up on top of the divorce, as well as skipping lectures to go shopping, maybe I would have got a better degree.
Well, the number of times that people who weren't following a course of further education told me that brainy people had no common sense, or that being academic wasn't the same as intelligence, it must be true.
It is a fact that not all intelligent people are academically successful, for various reasons. I believe that a massive factor in this is the early influence of teachers. If your maths teacher was an indecipherable tyrant when you were 11, you might just come away from that experience with a dislike of maths, and telling yourself that you are "no good" at maths.
HOWEVER, I strongly believe that with the right nurturing, ALL INTELLINGENT PEOPLE HAVE THE CAPACITY FOR ACADEMIC SUCCESS.
I don't believe the "brainy people have no common sense" catchphrase. It is what people say when they can't bring themselves to say, "Hey, you are very clever. You are learning things I don't understand. I am glad you are enjoying increasing your knowledge."
I don't believe that intelligence and the ability to treat others with kindness and respect are mutually exclusive. I have met arrogant, unkind, intelligent people and arrogant, unkind, stupid people.