The aim of this research paper is to investigate the effect of computer mediated team based learning in developing presentation skills among trainers. It provides theoretical background about computer mediated team based learning, and then clarifies how it can be used for developing presentation skills. In Computer mediated team based learning, trainers received instruction on how to prepare and deliver presentations in English, and practice their presentation skills in pairs and/or groups before presenting in front of the group.  Instruction and practice focused on three aspects of presentations: the verbal message (pronunciation, intonation), the non-verbal message (eye contact, posture, gestures, visual aids) and the rhetorical message such as speech building strategies (organization, logic, support).  Non-verbal and verbal aspects of a presentation were taught as a series of skills and once these skills were introduced, trainers practiced them through pair and group work.  Trainers were guided through the process as they prepared their presentations, and had ample opportunity to practice with a partner or partners before each performance.