For Gavin, that meant agreeing with his school to let him skip third grade, and working with teachers to find an appropriate curriculum.

CNN: Parents: How to raise a creative genius

Mr Andrews told MPs on Tuesday that his action was "appropriate" and intended to address an "unfairness" in the way grade boundaries were set.

BBC: Exams in progress sign

Again, with the caution that exams taken in isolation cannot be easily assessed, he says that a D grade is much too low - and he suggests that a B might be more appropriate.

BBC: A-level marking 'grossly unjust'