This study is premised on investigating the efficacy of co-teaching on learners performance in English language in inclusive education in Kaduna state of Nigeria. Co-teaching is a delivery instruction method where two or more professionals blend group of students in a single physical space. Co-teaching appeared in the literature in the early 1990s as a way to better address the needs of special education students. There are several different models of co-teaching which include one teaches, one observes, one teaches, one assist, station teaching, parallel teaching, supplementary teaching, alternative or differentiated teaching, and team teaching. Co-teaching also has a lot of benefits for the students or learners as well as the teachers. Inclusive education is a philosophy that advocates equal opportunities for all children regardless of whether they have a disability or not. It is primarily about restructuring school culture, policy and practice so that it responds to the diversity of students in the locality. It has its advantages and disadvantages. This study focused on the efficacy of co-teaching on learners performance in English language in inclusive education at Nabeela Academy in Kaduna, Nigeria