Alongside the fact that the classical learning method has been used for many years in the area of sports such as tae-kwon-do, there have been searches and attempts for unconventional approaches to teaching. One of these is the differential learning approach, it is important the repetitions vary in the differential learning approach and that the attention is given to the basis of the technique rather than the perfect execution of the move. Examining the literature, no study has been found which investigates the outcomes of the taekwondo training program applied with a differential learning approach despite the fact that other branches have supported the positive contribution of the differential learning approach in the literature. The aim of this research is to examine the effect of differential learning on the technical skill development of male and female taekwondo players with red-black belts in the 12-14 age group. A total of 16 taekwondo players, who have a red-black belt in the 12-14 age group star category and have a license of at least three years, participated in the research. In this quantitative research, the pre-test and post-test study group models (within quasi-experimental design) was used. Wilcoxon Test was used to examine the pre-test and post-test between the test values of taekwondo players. When the findings were examined, the differential learning approach has a positive effect on the technical skill development of the female and male taekwondo athletes.