Abstract

• The main purpose of the present study is to study the effectiveness of demonstration method on Grade Nine students’ achievement in physics. Demonstration method was used as a method of teaching that relies heavily upon showing the learner a model performance. Demonstration method includes five main parts: purposing, planning, demonstration proper, executing and evaluation. The design used in this study was a true experimental design; pretest-posttest control group design. According to the format of that design, (7) sample lesson plans of learning materials were constructed. The target population is Grade Nine students who are learning physics. Two high schools situated in Dagon and Mingalardon Townships were selected by random sampling method. Science combination students were selected. A total of (120) students and (4) physics teachers participated in it. Treatments were conducted separately in two groups. The experimental groups were taught according to the principles of demonstration method. The control groups were taught as usual. Learning materials were selected from Some Applications of Mirror Formula in Chapter (9), Reflection of Light and Electric Charges, Matter and Electricity, Conductors and Insulators, Charging by Induction and Materials and Magnets in Chapter (10), Electricity and Magnetism from Grade Nine Physics Textbook. Independent samples t test was used to test the hypotheses of this study. The result shows that there was a significant difference in the achievements of physics between the students who were taught by using demonstration method and those who were not. It can be suggested that the demonstration method should be used in the classroom in teaching physics. Therefore, it verifies that demonstration method bring positive contributions to the physics teaching as well as learning at the high school level. Finally, discussion, and suggestions were provided by the researcher based on the data for improving teaching physics and learning at the high school level.