The aim of this research was to investigate the extent to which instructional media is effectively used by secondary school teachers in their day today activities. The research design which was used in this research is the case study. Instruments which were used to gather data were interviews, questionnaires and observation. The population of the research were all 85 teachers and heads of departments (H.O.Ds) at Mkoba 1 High School from which simple random sampling was used to select a sample of 32 teachers and H.O.Ds. The literature reviewed showed that, there were various types of instructional media which could be used for teaching and learning but however there were also various changes which hindered teachers from using instructional media. Findings from the study revealed that, there were a variety of instructional media at Mkoba 1 High School which could be used for teaching and learning. However, teachers did not often use instructional media due to a number of challenges which included, lack of time, lack of knowledge on how to prepare and use the media, inadequate media, and lack of financial resources among other challenges. Teachers and H. O Ds proposed that, Mkoba1 should do staff improvement meetings in order to teach teachers on how to make and use media, and also reduce work load for them so that they could have enough time to use media and also hold fund raising activities in order to raise money to buy teaching media

Keywords : Instructional Media, Teaching And Learning, Secondary School.