In general, the sooner you help your child, the better chance they have of overcoming their dyscalculia; children in the first and second grades 8 who are taught counting show significant improvement in a short period of time. However, if intervention is left until the fifth grade, the outcomes are a lot less favorable. Your child is also more likely to have persistent dyscalculia if they have siblings who have the learning disability and if their dyscalculia is severe at the time of diagnosis.
Persistent dyscalculia doesn’t mean that your child will fail math. Dyscalculia is a recognized learning disability, so schools and colleges will usually make accommodations for dyscalculic students.