“…Across activities, teachers have to structure, group students, and flexibly manage the design and ordering of the activities (Dillenbourg & Jermann, 2010). Within activities, teacher support should be contingent, that is, adapted to the needs of an individual student or a group of students (Kaendler, Wiedmann, Rummel, & Spada, 2015;Vogt & Rogalla, 2009). The core of these competencies is that teachers must constantly be aware of the activities students engage in and the progress students are making, in order to be able to make informed decisions.…”