The aim of the project is to assure the participation of Portugal on PIAAC, a large scale assessment. PIAAC is an International study, promoted by OECD, aiming to assess adult competencies. A survey will be conducted in about 30 OECD country members to measure skills of literacy, numeracy and problem solving in rich technology environments, among the population between 16 and 65 years old. The assessment will be available and undertaken in two different formats: paper or computer based.