This is a common problem and it is not possible to give a simple answer because there are many different difficulties that can produce this pattern. For example, suppose your child can read grade-level materials but her reading speed is 50% of the normal speed for her age. The school’s testing will show grade-appropriate reading performance; the child will be frustrated at home because reading assignments take twice as long. Poor attention skills, reading comprehension difficulties and emotional problems are other possible explanations for this situation.