64 year old nerd with social phobias here. When I was in school, I had to practice oral knowledge tests since grade one. I had my first oral exam in grade six (math) and 2-3 oral exams every year since then. If I hadn't had that experience, I would never have gotten into university. I still don't like verbal communications with people (especially in a tense situations like exam), I'm slow etc, but it's manageable because I had to practice it a lot. I don't think I would have survived in modern "the environment must be made suitable for everyone" school/university.