The National Service Training Program (NSTP) consists of three components, but if you are asking about the "two parts" or phases of the program, it is structured into:

• NSTP 1 : The first semester course which includes a common module followed by the choice among the three components (Reserve Officers' Training Corps - ROTC, Civic Welfare Training Service - CWTS, or Literacy Training Service - LTS).
• NSTP 2 : The second semester course which is a continuation or follow-up of the component chosen in NSTP 1. NSTP 1 is a prerequisite for NSTP 2.

Each student must complete both NSTP 1 and NSTP 2, typically over two semesters, to fulfill the program requirements

. The three components students can choose from are:

• ROTC : Military education and training for national defense preparedness.
• CWTS : Activities contributing to community welfare and betterment of life.
• LTS : Training students to teach literacy and numeracy skills to others

In summary, the NSTP program has two parts (NSTP 1 and NSTP 2) that span two semesters, and within these parts, students select one of the three program components to complete their training