Maria Zimmermann is a post-doctoral researcher at the Humboldt University of Berlin. Previously, she worked at the University of Münster and received her doctorate in psychology in 2018. She researches how to promote learning and acquisition of skills in online learning environments. In particular, she is interested in how to adequately and effectively foster collaborative communication among learners and teachers in online learning environments. Since 2014, she has taught pre-service teachers. In DIALLS she is a researcher and will apply her experience in teaching pre-service teachers to the training of teachers in DIALLS. By evaluating the factors of the platform that will enable teachers to (re-)use DIALLS resources, she will contribute to widening the impact and increasing the sustainability of DIALLS.