Bert Slof is an assistant professor at the Department of Education at Educational Sciences. He gives lectures and seminars in several courses (e.g., Assessment and Evaluation; Instructional Design and Evaluation) and supervises students through their internship and while they are writing their Master’s thesis. His research is aimed at studying the effects of methods (e.g., feedback and visualizations) fostering collaborative problem solving (task-related and interpersonal behavior) and the professionalization of employees (e.g., teachers) at their workplace. In 2011 he received a grant to examine whether feedback with video-analyses of teaching behavior fosters teachers’ professional skill development. Within the European WatchMe project (Horizon 2020) he was responsible for developing the assessment (e.g., task, forms, scores) part of an E-portfolio enhanced with Learning Analytics for teacher education and the evaluation (i.e., usability, usefulness and effects on learning) of the portfolio-use. In the Charming project he is a co-supervisor within the ESR 13 project.