My son had letter and number reversals until he was 7.5. After his IQ test with very high PRI, I talked with him about how he sees the letters/numbers - he can flip them all around in his head. I told him that not everyone has that gift, so his teachers would appreciate if he wrote them the way the teacher sees them when he's doing school work - he can flip them all around when he is writing for fun. Pretty much resolved the problem.