& Background

History

Salomon Henschen
Found that it was possible for someone to have a mathematics disability, without affecting their intelligence, in general.


Josef Gertsman
Came up with the term dyscalculia



Dr. Ladislav Kosc
He conducted the first study on children.
Study showed that dyscalculia is a structural disorder of mathematic abilities.


Geary
Cognitive development psychologist
Below the 35th percentile after testing through Woodcock-Johnson Mathematics reasoning test have difficulty with mathematics in certain areas of the brain.

1974

2000

1919

1940