CRA Instructional Sequence: , Abstract instructional sequence is an approach that moves students from using concrete manipulatives to representational drawings to abstract numbers when learning new concepts and is a best practice for all learners. Dyscalculic learners will need to experience this sequence multiple times and gradually, when developing new skills and understandings.

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You’ve always struggled with numbers — not just complex math, but basic arithmetic, telling time on analog clocks, handling money, or keeping track of quantities. You’ve been told you’re “just not a math person,” or perhaps you’ve chalked it up to laziness or poor concentration. But for many adults, the underlying cause is dyscalculia: a neurodevelopmental learning disability that specifically affects the ability to process numerical information.

Dyscalculia is often called the “forgotten learning disability” — far less recognized than dyslexia, yet affecting approximately 3–7% of the population. In adults, it frequently goes undiagnosed, leaving people managing its impacts without ever having a name for what they experience.

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