The Effect of Demonstration, Guided-Discovery and Expository Instructional Methods on Senior Secondary Students Achievement in Physics in Ikot Abasi Local Government, Nigeria
Keywords:
students’ achievement, Guided-discovery and Expository instructional methods, Demonstration, PhysicsAbstract
This study examines the effect of demonstration, guided-discovery and expository instructional
methods on senior secondary students achievement in Physics in Ikot Abasi Local Government of
Akwa Ibom State, Nigeria. Three hypotheses guide the study. It adopts quasi-experimental using
pretest and posttest non-randomized groups design. The population comprised all the Senior
Secondary two physics students of the 2021/2022 session in the public secondary schools in Ikot
Abasi Local Government Area. A total of 172 students (60 in the first, 58 in the second and 54 in the
third experimental groups) constitute the sample selected from 12838 students (male 5614, and
female 7224). Physics Achievement Test on Waves (PATW) with a reliability index of 0.87 is used for
data collection. Three different teaching packages are prepared and used in the teaching of Waves.
The instrument is validated by experts consisting of Physics lecturers from Akwa Ibom State
University, Research, Measurement, and Evaluation lecturers from the University of Nigeria, Nsukka,
and Physics teachers within the selected schools for the study. The data are analyzed using
descriptive statistics, while research hypotheses are tested at a 0.05 level of significance using
Analysis of Covariance (ANCOVA). There is a significant difference among the mean achievement
scores of Physics students when taught waves using Demonstration, Guided-discovery, and
Expository instructional methods. Male students significantly achieved more than their female
counterparts. Based on the findings, it recommends guided discovery in teaching waves followed by
demonstration and expository instructional techniques to Physics students.
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