Abstract

• The major purpose of this research was to study effectiveness of Advance Organizer Model on students� science achievement at the middle school level. This study was conducted with both quantitative and qualitative research methods. For quantitative research, an experimental study was used to study effectiveness of Advance Organizer Model. In this experimental study, the subjects were Grade Eight students selected from No (1) BEHS Latha and No (4) BEHS Pazundaung. The experimental designed adopted in this study was a true experimental design, namely, posttest only control group design. For this study, (120) Grade Eight students were selected from both schools by random sampling method. These students were divided into two groups: control and experimental. The experimental group was treated with Advance Organizer Model and the control group was taught with formal instruction. After that, a posttest was administered to two groups. Independent samples t-test was used to test whether there was significant difference between these two groups. Examination of the means and t-test at No (1) BEHS Latha (t=11.99, df =58, MD=7.94, p=.000) and No (4) BEHS Pazundaung (t=13.90, df=58, MD=8.30, p=.000) indicated that students who were taught by Advance Organizer Model demonstrated significantly better than those who were taught with formal instruction. The qualitative data also supported the findings from the experimentation. For this research study, students from the experimental group from two selected schools were given a questionnaire. The results showed that the students expressed their willingness to learn in Advance Organizer Model and they had positive attitudes towards this Advance Organizer Model. Research findings proved that Advance Organizer Model has positive contribution to the science teaching at the middle school level.