Data were analyzed qualitatively and quantitatively through t-tests and Normalization-Gain. The research instruments were a questionnaire, form of the analysis lesson plan and observation instructional performance, the items of teacher knowledge and learners' achievement. 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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