Group projects are an important part of many educational programs. In these projects, groupware tools like shared workspaces, shared editors, and synchronous or asynchronous communication tools (video conferencing, chat, email, forum) are often utilized. For synchronous collaboration, video conferencing systems are often used since they allow for direct and effortless informal communication via speech and video. If the group is to reflect about the content and way of communication and collaboration within and across meetings, the group needs access to the development of artifacts as well as the conversation of the meetings. While some video conferencing systems allow recording of a meeting, accessing content and dialogue structure requires real-time viewing and detailed note-taking. To reduce this effort, a video chat should include a transcription functionality that is able to support students in an online group work session by providing a video chat with automatic creation of a transcript. For this purpose, a video communication tool named T[superscript 3] was developed that enables communication between learners and generates a transcript through an integrated automatic speech recognition (ASR) system. The transcript can be used to reflect on the conversations in order to recall the topics discussed or to identify group work problems, such as insufficient participation, coordination and collaboration problems. The implementation of T[superscript 3] uses voice activation detection, WebRTC and ASR models to maintain a high level of quality in the transcription process. Initial functionality tests demonstrated the ability of T[superscript 3] to create accurate group discussion transcripts, making it attractive for students and teachers to assess and improve communication and collaboration, and for researchers studying group discussions.