Many schools across the United States have been using distance learning technologies to help them meet new state-mandated curriculum requirements. Distance learning refers to the live, simultaneous transmission of a master teacher's lessons from a host classroom or studio to receive site classrooms in distant locations. Schools with the most to gain from distance learning technologies are rural and small schools--those with low student enrollments and/or those lacking trained personnel. This paper summarizes present technologies that allow live, two-way audio and/or visual interaction between two or more sites simultaneously for educational purposes. Emphasis is on programs specifically benefitting students in rural and small schools. Descriptions are given for the four most widely used instructional television satellite systems, two-way interactive television systems, Instructional Television Fixed Service (ITFS) systems, audio-graphic teleconferencing, and audio-teleconferencing. Appendix A lists addresses of successful, on-going distance learning projects that interested readers can contact for additional information. Appendix B presents names, addresses, and brief descriptions of 57 telecommunications vendors in the United States. (JHZ)