They consisted of 64 people as an experimental group and 64 people as a control group from different High School. The sample of learners is chosen randomly. A total of 36 junior chemistry teachers as the experiment group, and 36 senior chemistry teachers as the control group, and were selected by purposive-sampling. This study applied the experimental method with matching only pretest-posttest control group design. This research aim is to reveal the components of Educative Curriculum Material (ECM) and its impacts on the chemistry teachers’ instructional performance and learners’ achievement.
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