The authors present an approach to the assessment of learning disabilities based on a definition of significant enabling skills for school learning. Students' competence in information processing, language, and mathematics is assessed in 11 tests. By using the Assessment of Basic Competencies test, it is possible to determine a child's location in each of 11 developmental sequences, as well as to identify strengths and weaknesses in clusters of skills. Assessment results provide data for designing the individualized educational program. (Author)