An adaptive educational system that uses adaptive presentation is presented. In this system fragments of different images present the same content and the system can choose the one most relevant to the user based on the sequential-global dimension of Felder-Silverman's learning style theory. In order to retrieve the learning style of each student the Felder-Soloman ILS questionnaire is used. A prototype adaptive educational system was developed and pilot tested. Evaluation of the prototype system was based on the USE questionnaire. Statistical analysis was performed using the results of the ILS questionnaire, as well as using the results of USE questionnaires completed by students in order to evaluate the pilot application of the prototype adaptive educational system. The results of the statistical analysis are presented and conclusions for future development of adaptive educational systems are discussed. (Contains 2 figures and 8 tables.)