This study investigates the level of use of instructional materials and students’ academic performance in senior secondary schools in Ado Local Government Area of Ekiti State. The researcher makes use of questionnaire to get some fact from the students’ n the selected schools. The population for the study consisted of four selected governmental secondary schools in Ado local government. A t-test method was adopted in the findings. It was revealed through the result of this study that most of the instructional materials that can improve students’ performance were not fully adequate. It was recommended among others that efforts should be made by all the stakeholders in the educations sector towards the provision of adequate instructional materials in school for effective teaching and learning of physics in Ado Local Government and Ekiti State Secondary Schools at large.