This article describes the results of a study entitled “Simas and CoolModes in the Development of Basic Competencies; An Experience in the Formation of a Technology-mediated Learning Community.” It was conducted at the INEM School in Bucaramanga (Colombia); two schools in Cundinamarca also took part. Three learning communities were formed with researchers (interaction between two consolidated groups and three in the process of consolidation), teachers (teachers of four different subjects at the three schools were involved) and students. These communities interacted through the development of technology-mediated learning activities. The technology included knowledge representation software that takes advantage of ontologies (Simas), software for graphic representation and collaborative problem-solving (CoolModes), and a web platform to promote the construction of the community (portal Colombia Aprende). The process used to construct the community is described, and the products obtained in the four subject areas, through the use of different computer environments, are analyzed. The factors identified as decisive to formation of the community are: the quality of the technology platform, skill in using the technologies and their predominant use in recreational activities, and the actors’ culture and attitude towards collaborative work.