The InterCLASS standard version has all the necessary features that teachers need to manage their computer lab, including a video file playback control feature. The InterCLASS Live Video version includes the Live Video add-on to the standard version. This add-on enables teachers to connect any classroom A/V device to the teacher computer and then to capture and simultaneously stream audio and video from the A/V device (DVD player, Document Camera, etc.) in real time to the student screens directly. The Live Video Add-on only costs $10 per computer and one video capture device for the teacher computer only is $50.