Judgment of the Court (First Chamber) of 30 March 2023.#Hauptpersonalrat der Lehrerinnen und Lehrer beim Hessischen Kultusministerium v Minister des Hessischen Kultusministeriums.#Reference for a preliminary ruling – Protection of personal data – Regulation (EU) 2016/679 – Article 88(1) and (2) – Processing of data in the employment context – Regional school system – Teaching by videoconference due to the COVID-19 pandemic – Implementation without the express consent of teachers.#Case C-34/21.