Effect of Guided-Discovery and Expository Instructional Methods on Secondary Schools Students Academic Achievement in Physics in Ikot Abasi Local Government Area, Akwa Ibom State, Nigeria

Abstract

This study determines the effect of guided-discovery and expository instructional methods on Senior
Secondary students’ academic achievement in Physics in Ikot Abasi, Akwa Ibom State, Nigeria. The
design was a quasi-experiment using pretest and posttest non randomized groups. The population
comprised all the Senior Secondary two Physics students of the 2022/2023 session in the public
secondary schools. In all, a sample of 182 students (90 in the first and 92 in the second experimental
groups) was selected for the study. Purposive sampling technique was used to select the schools.
Physics Achievement Test on Waves (PATW) was the instrument used for data collection with
reliability index of 0.85. The instrument was validated by experts consisting of Physics and Research,
Measurement and Evaluation lecturers from Akwa Ibom State University and a Physics teacher in one
of the selected schools. Two different teaching packages were prepared and used in the teaching of
Waves. Data were analyzed using mean and standard deviation while Analysis of Covariance
(ANCOVA) was used in testing the research hypotheses at a 0.05 level of significance. The findings
showed a significant difference between the mean achievement scores of Physics students when
taught waves using guided-discovery and expository instructional methods. It recommended guideddiscovery and expository instructional methods in teaching waves to Physics students.Ajayi P O (2008). Evaluation of instructional materials for the implementation of senior
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