Abstract

• The main purpose of this study is to investigate the effectiveness of proposed process oriented guided inquiry learning model for chemistry teaching at the high school level in Myanmar. The research design was one of the quasi-experimental designs, the nonequivalent control group design. The participants were selected from Grade Ten students in BEHS Yekyi, BEHS Kwin Thone Zint, BEHS (5) Hinthada, BEHS Neikban, BEHS (2) Danuphyu and BEHS Alamyo in Ayeyawady Region by using simple random sampling method. There were totally (483) participants to conduct the experiment for this research study. From each school, two intact classes were randomly selected as experimental group who received proposed process oriented guided inquiry learning model and control group who received formal instruction. The instruments were pretest, posttest, and questionnaire. The data were analyzed by using one-way analysis of covariance (One-Way ANCOVA). According to ANCOVA results, there were significant differences in the achievement on concept skills between the experimental groups and control groups in all schools. The results of students’ responses from questionnaire expressed that all students who participated in experimental groups had positive attitudes towards proposed process oriented guided inquiry leaning. Research findings proved that proposed process oriented guided inquiry learning model had positive contribution for chemistry teaching at the high school level in Myanmar.