The primary goal of this study is to complete the adaptation, validity and reliability studies of the long (17 items) and short (9 items) forms of UWES-SF. The secondary goal of this study is to study the mediating role of work engagement between academic procrastination and academic responsibility in high school students. The study group consists of 597 students, who are enrolled into various high schools in Mersin during the academic year of 2013-2014. Confirmatory factor analysis (CFA) was used in order to investigate the factor structure of UWES-SF; Pearson moment coefficient was used for the correlation values between the hidden variables observed in the criterion-related validity study; Cronbach Alpha coefficient was used to determine internal consistency reliability coefficients; inter-item correlation and total-item correlation was calculated to determine item validity and homogeneity. Multiple regression analysis was also used for the mediation test. The results for the Turkish forms of the UWES-SF shows that it can be used in a valid and reliable way on the high school students within the country. Along with this, it was clearly seen in this study that work engagement has a mediating effect between academic responsibility and academic procrastination.