The implementation of the K-12 Senior High School program makes Filipino students competitive globally. On this premise, a study assesses the K-12 Senior High School program of Laboratory High School (LHS) of Cotabato City State Polytechnic College (CCSPC). It also explored the resources, teachers' instructional practices, the attainment of the program's objectives and the implementation challenges. It employed descriptive-evaluative design. It administered survey questionnaires to 202 total respondents composed of 169 senior high school students who were chosen randomly and 30 teachers, including three staff, who were selected using Complete Total Enumeration. It was conducted last school year 2019-2020. Results revealed that services and resources evidently provided. The teachers LHS have evidently practiced the instructional practices in terms of teaching strategies, classroom management, and assessment of learning. Considering the findings, it was concluded that Despite the big class size and with faculty possess degrees appropriate and relevant to the high school program and other qualifications. The LHS maintains its public image of excellence in both curricular and extracurricular activities, which signifies that the Laboratory High School's instructional supervision is of a high standard.