National Primary Year Education of SISC is aligned with the Khmer General Education (KGE) curriculum of Ministry of Education Youth and Sport (MoEYS) of Cambodia. This programme consists of 6 academic years from Grade 1 to Grade 6. 

After completing the primary level, students are equipped with the basic competence and knowledge of Khmer Language, Mathematics, Sciences, Social Sciences, and Information Communication Technology (ICT), all of which are fundamental subjects to prepare students for the Secondary Year Levels. Students, who are successfully completed KGE Program at SISC, are entitled to transfer to other local public and private schools without reducing credits or grade.