Elon Musk was a good student, Walter Isaacson’s notes (in his biography of Elon), but not a superstar:
When he was nine and ten, he got A’s in English and Math. “He is quick to grasp new mathematical concepts,” his teacher noted. But there was a constant refrain in the report card comments: “He works extremely slowly, either because he dreams or is doing what he should not.” “He seldom finishes anything. Next year he must concentrate on his work and not daydream during class.” “His compositions show a lively imagination, but he doesn’t always finish in time.” His average grade before he got to high school was 83 out of 100.
After he was bullied and beaten in his public high school, his father moved him to a private academy, Pretoria Boys High School. Based on the English model, it featured strict rules, caning, compulsory chapel, and uniforms. There he got excellent grades in all but two subjects: Afrikaans (he got a 61 out of 100 his final year) and religious instruction (“ not extending himself,” the teacher noted). “I wasn’t really going to put a lot of effort into things I thought were meaningless,” he says. “I would rather be reading or playing video games.” He got an A in the physics part of his senior certificate exams, but somewhat surprisingly, only a B in the math part.