Yoga is one of the six orthodox systems of Indian philosophy which is viewed as a physical, mental and spiritual discipline that confers a sound body and sound mind. One of the main aims of practice of yoga is to have good cognitive control. Pre-University education is a very important stage in the educational ladder of students. At this stage students are in need of good cognitive abilities. While there are no studies done on this group about the effects of yoga, this study was undertaken to assess the effect of short term practice of yoga among Pre University students. Executive function was tested with Golden version - Stroop Color and Word test in control group, before and after the intervention among yoga group. Results were statistically analyzed using Bonferroni post hoc test. Students in yoga group had performed better than the control group. Short term practice of yoga had a beneficial effect on cognition – selective attention and cognitive flexibility in the Pre-university students.