NJROTC Instructors are local educators working under the _____________.

The correct choice refers to the fact that NJROTC instructors are primarily associated with the educational institution where they teach, working under the authority of the school's principal. This relationship emphasizes the local control and integration of the NJROTC program within the broader educational framework of the school. Instructors operate as part of the school's faculty, sharing the common goal of fostering student development and promoting leadership, citizenship, and naval awareness.

The other options represent government positions or branches unrelated to the direct supervision or administrative structure of individual NJROTC programs at schools. The Secretary of the Navy and the President of the United States are higher-level authorities that set overarching policies for military programs, while the Department of Education provides federal guidelines but does not manage day-to-day operations at the school level. Thus, the relationship between the NJROTC instructors and the school's principal ensures that the program functions effectively within the educational environment.