The aim of the project is to support specialists in psychological and pedagogical clinics by developing and disseminating diagnostic tools for specialised diagnosis of children and adolescents in the cognitive area. The design of a set of diagnostic tools will be based on a proprietary, innovative theoretical concept, called the multidimensional Cognitive Function Model (WMFP), which uses execution functions (memory, attention, thinking) in its structure in conjunction with the sphere of perception, language and communication. This theoretical solution allows the measurement of various cognitive functions within a coherent theoretical concept. The set will include a computer cognitive test battery (by a child) consisting of a variety of tests measuring 5 cognitive functions, as well as observational scales of cognitive development, designed for parents and teachers, which will enable the diagnosis of 270 degrees. The developed diagnostic tools, through the use of a special adaptation and adaptation procedure, will also be used in the diagnosis of the possibilities, potential and limitations of pupils with disabilities, and special educational needs (SPE). The design of the toolkit will take into account requirements related to the health of the respondents, in the form of so-called general adjustments and adaptation of the tool to selected groups of children with disabilities and SPE. In the case of 4 groups, separate standards will be developed, and for all groups, cognitive function profiles will be developed. The substantive concept is based on the assumptions of functional diagnosis using the ICF classification, which will allow the assessment of children’s performance, potential and limitations, including environmental constraints.The use of batteries will allow specialists to recognise the needs, potential and capabilities of pupils in the cognitive area, and the difficulties resulting from these deficits, as well as the diagnosis of deficits and the resulting school difficulties.