Do children with mathematical learning disabilities use the inversion principle to solve three-term arithmetic problems?: The impact of presentation mode.

Numerical inversion is the ability to understand that addition is the opposite of subtraction and vice versa. Three-term arithmetic problems can be solved without calculation using this conceptual shortcut. To verify that this principle is used, inverse problems (a + b - b) can be compared with standard problems (a + b - c).

Care course in children with Specific Language and Learning Disorders.

Specific language and learning disorders concern about 5 %l of the population and explain a significant proportion of educational difficulties and schoolfailure in France. If they are not recognized in time, they can lead to school exclusion if not illiteracy. Reference Centers for specific language and learning disorders were created in the 2000's and improved consis- tently diagnosis and management of such disorders but there remain many difficulties: appointment's delay in these centers, professional training, limited care access in some areas and financial support for specific checkups and cares insufficiently refunded by the Health services, excluding low-income people.