This is an XML dataset of 17 lecture recordings randomly sampled from the lectures recorded at the Faculty of Informatics, Brno, Czechia during 2010–2016. We drew a stratified sample of up to 25 video frames from each recording. In each video frame, we annotated lit projection screens and their condition. For each lit projection screen, we annotated lecture materials shown in the screen. The dataset contains 699 projection screen annotations, and 925 lecture materials.