This paper examines the effectiveness of using an online trainer to improve students’ academic performance. Achieving a high level of students’ academic performance is a challenging task for all participants of the educational process. However, it is e-learning tools that can do it most effectively. Distinctive features of online trainers are interactivity, multimedia, visibility, virtuality, independence, mass and technology. Due to these characteristics, learners become more involved and interested in improving their skills, their cognitive activity, learning motivation, desire to reduce mistakes, ability to self-organization and self-discipline increases. This paper describes an experiment involving two groups of students who had approximately the same learning outcomes at the initial stage of the study. However, one of the groups utilized an online trainer during the study, which entailed higher academic performance in these learners. Using Student's t-test it was shown that the mean score of the group of students who used the online trainer was different from the mean score of the students who did not use it. The mean for the group of students who used the online trainer in studying was found to be higher.