Information and communication technologies such as radio and television have long been used in education. The advent of the technology of the Internet has created pressure for Internet access in primary and secondary schools across the world. This paper reviews some of the available evidence on the impact and cost of such technologies in developing countries. It concludes that while there is strong evidence for the efficacy and efficiency of interactive radio instruction, the evidence on the impact of computer-supported education remains mixed, and costs are prohibitive for many LDCs (less developed countries).