In addition to formal learning at universities, like in lecture halls and seminar rooms, students are regularly confronted with self-study activities. Instead of being left to their own devices, students might benefit from a proper design of such activities, including pedagogical interventions. Such designs can increase the degree of activity and the contribution of self-study activities to the achievement of learning outcomes. Especially in times of a global pandemic, self-study activities are increasingly executed at home, where students already use technology-enhanced materials, processes, and digital platforms. Thus we pick up these building blocks and introduce TecCoBot within this paper. TecCoBot is not only a chatbot, supporting students in reading texts by offering writing assignments and providing automated feedback on these, but also implements a design for self-study activities, typically only offered to a few students as face-to-face mentoring.