The teacher's special education certification (SPEC) degree is a barometer for their competence in study, practice, and policy. This research compared the test scores of elementary and middle school children with learning disabilities and emotional and behavioural disorders taught by Special Education Teachers (SET) to those of students who General Education Teachers (GET) led in the same subject areas. The type of certification for teachers has little impact on most student groupings. In Learning Disabilities (LD) and regular education, students with LD and more extraordinary intellectual ability performed better in English language arts (ELA) with a trained teacher. Students with Emotional Behavioural Disorders (EBD) who were less proficient in mathematics were less likely to be helped by SET compared to General Education (GE) and Licensed Special Education Teachers (LSET). These words' actual meanings are examined concerning SET quality measures. The outcomes reported here should be understood under several constraints. Operational datasets, like the one utilized in this study, rarely contain data on crucial factors that affect an exceptional education-certified or dual-certified teacher's capacity for effectiveness.