Visual presentation equipment, namely, document cameras, which consist of a video camera, arm lights, base light and viewing base, which is used to display objects, printed materials, slides and transparencies; computer software for use in the field of audio and video presentations and communication; Electric monitoring apparatus, namely, surveillance cameras; TV monitors; lenses for surveillance cameras; rotational stands for surveillance cameras; surveillance camera housing units; electronic control apparatus for surveillance cameras; wireless audience participation systems, namely, handheld keypads with transceivers for use by audience members in entering, transmitting and receiving information in an audience environment and associated host transceivers connectable to computers for receiving wireless transmissions; computer software for displaying, analyzing and organizing information transmitted via the audience participation systems and for providing instruction in fields of math, science, social studies, reading and writing, and for creating and viewing slide shows, graphics, text, and sounds; Audio amplifiers; Audio speakers; Computer software to enhance the audio-visual capabilities of multimedia applications, namely, for the integration of text, audio, graphics, still images and moving pictures; Computer whiteboards