Article History
Received: 6 July 2021
Accepted: 20 June 2022
First Online: 27 August 2022
Declarations
:
: The study reported in this paper had the Institute of education monitoring and quality development of Hamburg (Institut für Bildungsmonitoring und Qualitätsentwicklung - lfBQ) aproval (181-24.03/218,62). Informed consent was obatined from every schools headmasters and all participants as well as their legal guardians. Data handling and analysis followed the rights of the General Data Protection Regulation (Datenschutz-Grundverordnung - DSGVO).