The profession of integration teaching is currently receiving considerable attention. The competency framework for teachers is assessed based on the 2018 General Education Program (GEP), which emphasizes the development of students' personal competencies and sets new competency requirements for teachers. This program provides detailed guidelines for teaching and learning in the modern era. The objective of this study is to evaluate the extent to which teachers' training and teaching competencies align with the 2018 GEP. The present study surveyed 611 primary school integration teachers across 32 schools serving disabled students in five provinces and cities within Vietnam. In this study, an assessment of teachers' competencies in various aspects of education and teaching was conducted. The results revealed high levels of proficiency among teachers in assessing and nurturing students' qualities and competencies, as well as in devising pedagogical strategies to enhance students' inherent capabilities. The limited language proficiency, particularly in local and foreign languages, has significant implications for ethnic minority students, who rely on native language instruction for effective learning. This limitation hinders the implementation of the 2018 GEP, especially in regions with a high density of ethnic minority populations. Additionally, teachers showed proficiency in creating safe and culturally educational environments and establishing relationships among students, teachers, and parents. Nevertheless, collaboration with families and communities to achieve educational goals exhibited lower competency levels. Furthermore, teachers demonstrated capabilities in researching and updating subject knowledge, along with supporting colleagues in developing professional competencies. The study also explored stakeholders' perceptions regarding educational practices, indicating varying levels of correctness in responses. This study significantly contributes to the evaluation of current primary school teacher competencies and offers valuable data for school managers, administrators, and teachers to gain a more holistic understanding of this matter.