Abstract: A method and system for operating a collaborative network of participants attending an event/meeting presentation in person employs a web-based control server connected online with participants using their personal networked computer devices. The control server sends a question or prompt to and receives inputs from participants via the display screens of their personal networked computer devices, and calculates aggregated results of participant users' inputs for display on the event/meeting display screen, then sends a next question or prompt to the participants for a next activity step of the group activity. Real-time group interactivity of participants in the event/meeting presentation is enabled through mobility and convenience of participants using their networked personal computer devices such as smartphones for participating in the group activity.