I never let people know how much I Knew

I never let people know that I can do something till I have to do it in front of them. I learned to read when I was 5 but could not read out loud for fear of making a mistake in the pronunciation of the words even though I could read them. I was never called that but I was never called anything other then a teachers best student because i did not ask for any help ever. the first thing I got good at writing was my name also.