Themajor purpose of the study was to investigate the effect of taekwondo exercise training on Dembecha preparatory and general secondary schoolgrade 11thstudents’ academic achievements. To the end participant students overall academic achievement after the treatment experimental group received the training was compared with thosestudents who did not attend the training. Hence, a non-equivalent groups’ posttest design style of the study with one group receiving the taekwondo training and the other comparative who did not take the training overall academic achievements of the second semester were analyzed. The mean for each groups scores, the standard mean deviation effect size, and compared using t-test for independent sample(EG&CG) and paired sample test(pre & posttest EG) and examine the magnitude of observed differences between groups effect size (Cohen’s eta squared) was calculated, the classroom posttest and taekwondo exercise test scores were correlated to see whether taekwondo training has effect on target group students after the experimental group attended a 20 week taekwondo training 3 times a week for40-60minute per day. Quiz- experimental research design was employed and 60 students with the age of (16-21) were selected by disproportional stratified simple random sampling method, treatment group student parents, 8 school physical education teachers and 3 school principals were selected by purposive sampling method from Dembecha preparatory and general secondary school grade eleven to collect data. Both quantitative and qualitative data analysis methods were employed,the instruments for collecting data were; questionnaires of close-ended and open-ended prepared for students and parents, school physical education teachers and school principals using semi-structured interview, and document analysis for students’ classroom test result and taekwondo test result to collect data. In order to interpret the data collected through questionnaire and semi-structured interview, percentages mean using tables were used for quantitative data gathered from students and parents, descriptive used for qualitative data gathered from students, parents, school physical education teachers and school principals. The result showed t (58) =2.588 is greater than t-table at alpha value=2.021, (p<0.05), paired sample test t(29) =9.25 is greater than t-table at alpha value=2.045, (p<0.05)and Pearson Product Moment Correlation (xry=0.848).The result of the study revealed that there is association between taekwondo exercise training and academic performance in education.Over a time students engage in developmentally appropriate taekwondo exercise their improved physical fitness can have additional positive effects on their academic achievement in different subject areas, used as a break from academic learning time post engagement effects include; better attention, concentration,memory,increased on task behaviors and improved academic performanceand participation in taekwondo improves the academic achievement scores, ability of students to succeed academically, and mental or cognitive development. Finally, this study also confirmed that taekwondoexercise is very useful and helpful for enhancing students’ capability to learning and development