Our 15 y.o. reads at MY age level.(really, really old.) Our 8 y.o reads ABOVE her 5th grade sister's level. And the 5th grader is 'slow' because she has the mindset that if she doesn't think she has it 'right' she isn't gonna say/do something to 'prove' it. LOL! Our twins (7 y.o.) are something quite 'unique'. Quite the 'bang-your-head-against-the-wall' experience. I'm told it's normal since twins are so 'wrapped up tight' with each other.