AUTHOR=Wirth Laura , Kirsten Katharina , Serpé Christian , Greefrath Gilbert TITLE=Comparing different types of instructional videos in a flipped proof-based classroom JOURNAL=Frontiers in Education VOLUME=9 YEAR=2024 URL=https://www.frontiersin.org/journals/education/articles/10.3389/feduc.2024.1438355 DOI=10.3389/feduc.2024.1438355 ISSN=2504-284X