A method, system, and computer program product for providing full two-way interaction among participants at a large number of locations. A method for providing presentation services may comprise receiving an audio stream and a plurality of video streams of a presentation, wherein at least some of the plurality of transmitted video streams have different frame rates, resolutions, or both, receiving an audio stream and a video stream of each of a plurality of participants to the presentation, selectively transmitting the audio stream and the plurality of video streams of the presentation and the audio stream and the video stream of each of the plurality of participants to a presentation location and to each of the plurality of participants.