This document provides information concerning the second wave of data collection of ySKILLS longitudinal survey items conducted within Task 4.2. in six countries: Estonia, Finland, Germany, Italy, Poland, and Portugal.The aim of Task 4.2. was to develop a robust longitudinal survey to measure both short and medium-term impact of information and communication technologies (ICT) on youth. The data is collected in three waves. The survey focuses on four dimensions of well-being (cognitive, physical, psychological, and social) and several areas related to ICT use. Specifically, the questionnaire is divided into the sections listed below. For a detailed overview of each section, see the data dictionary.