The basic essence of school is a formal educational institution, where school is a place to gain knowledge. It is true that SDH is a place to gain knowledge for a student, but SDH as an institution not only emphasizes "Gaining Knowledge" but also emphasizes education that is holistic or comprehensive. The holistic education implemented by SDH as a Christian Educational Institution emphasizes an education system that is able to develop the maximum potential of each individual, where these individuals are unique so that the "Output" of this system varies greatly from student to student.

The education system perceived at SDH is transformative, where learning activities are not bound, but flexible. The education system at SDH emphasizes the "Why and How" question which is very concerned about the meaning of a problem and solves it collectively. SDH as an educational institution also encourages every student to actively participate in all self-development activities such as extracurricular and After-School for various fields of knowledge and student interests.