Abstract: A system provides dynamically controlled participation allocations for communication sessions. A system can create a queue for participants of a communication session, such as an online meeting. The queue can be generated for a communication session having an intended format that allows participants to individually speak in succession, such as a Question and Answer (Q&A) session. The system manages a user interface (UI) of the communication session displaying a timer that changes dynamically for each participant indicating a total time for his or her questions or comments based on an amount of time left for the meeting to end. The system displays, augments, and associates a timer for each participant indicating a total time for his or her questions or comments, which is based on an amount of time left for the meeting to end, number of users providing a “hand raise” input, and history of participation for each participant.