Teacher training is high on the priorities of the European Commission. One action has been to fund three Telematics projects that focus on telematics and teacher training within the Telematics Application Program. This paper is part of the work of the T3 (Telematics for Teacher Training) project which is coordinated from the University of Exeter. The T3 project focuses on the establishment of communities of teachers in four discipline areas: (1) mathematics, (2) science, (3) languages, and (4) technology. T3 uses two complimentary channels of telecommunications: Internet applications including World Wide Web, e-mail and computer conferencing, and ISDN applications, particularly point-to-point enhanced video conferencing. Describes resources for science teacher (Euroturtle environmental Web site, preservice for biology student teachers, and teaching environmental education) and courses for teacher educators (collaborative professional development, online service to teachers in schools, and modular course for advanced students). Successes and problems and future developments of the T3 project are discussed. (Contains 21 references.) (AEF)