Types of Dyscalculia
| Number Concept | When basic concepts (such as place value and large numbers) are not strong, development of more sophisticated procedures will be delayed.
May have understanding of basic number concepts, but are unable to apply the number concepts to arithmetic problems |
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| Counting Skill | Deficits in counting knowledge and counting accuracy. May have problems keeping numbers in working memory, causing frequent errors. |
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Procedural Disorder | Algorithms used are developmentally immature
Difficulty with sequencing multi-step procedures Difficulties with understanding concepts of procedures and frequent mistakes in applications |
| Memory Disorder | Difficulty retrieving derived facts with accuracy, and often relies on concrete counting (w/ fingers)
May be related to long term memory deficit or may have difficulty with selective memory retrieval (for relevant information) |
| Visual-Spatial Disorder | Difficulties with spatial arrangement of work, especially when solving problems involving columns
Frequently misread numbers and symbols Difficulty with place value and placement of numerals Difficulty with problems involving space in area (geometry, algebra) |