The research assessed the Cases of Students' Tardiness of the Grade Twelve Students of Kawit National High School, Kawit, Medellin, Cebu School Year 2017-2018, as the basis for some proposed interventions. The study employed the descriptive normative survey method utilizing the questionnaire technique resorting to the complete enumeration among the 166 grade twelve students and 20 teachers in the Senior High School Department. It focused on answering questions, on the profile of the grade twelve students, as to the: personal background as regards: age, gender, track enrolled and socio-economic status of parents, educational attainment, combined monthly income of the family and the number of children in the family; the profile of the Senior High School teachers in terms of; personal background as regards: age, gender, civil status, and professional qualification in terms of degree earned, a primary and or minor field of specialization, and length of teaching experience. Based on the indicated findings, it could be briefly stated that there was no significant relationship between age, gender, track enrolled and mostly from other combined monthly family income except P 5, 000.00 – P 9, 999.00 and P 15, 000.00 – P 19, 999.00 and the external and internal factors affecting grade twelve students’ tardiness in the Senior High School Department of Kawit National High School; Kawit, Medellin, Cebu for the School Year 2017- 2018 hence the computed t-test was higher to 0.05 level of significance which denoted a very high correlation leading to the acceptance of null hypothesis as shown on Table 10. With the indicated conclusion, most notably in the cases of students' tardiness, and external and internal factors, it was therefore recommended that the herein formulated interventions for a development program be strictly implemented.

Keywords : External Factors, Internal Factors, Interventions, Tardiness.