This paper gave an insight into what instructional media and effective teaching learning is. This paper examined the various definitions of instructional media by different authorities and traced the history of instructional media from 1900 to 1950 when computers were utilized by researchers. The role of instructional media were vividly discussed, to show us the extent to which it has recovered its achievement in the teaching learning process. The research used descriptive statistical method such as frequency and percentage to examine the impact of instructtional media on academics performances of Secondary School students of both private and public in some selected local government in Oyo State. Also, correlation was conducted to established the relationship between the teacher’s response and the student’s response on “impact of instructional media”. Five Schools: three private and two public schools in Oyo State. Forty (40) questionaires were administered to each school since they have relatively same population size, twenty questionnaires for Student and twenty for teachers (a total of two hundred questionaires were administered in all). Keywords : Instructional media, effective teaching, effective learning, and computer assisted instruction. DOI: 10.7176/JEP/13-13-02 Publication date: May 31 st 2022