Abstract:
The purposes of this study were : to construct instuctional packages in Physics on collision and momentum for Mathayom Suksa V students with efficiency of 80/80 and to study the atudents' learning achievement.The sample used in this study consisted of 60 science program students from Mathayom Suksa V who were studying in the second semester of the academic year of 1996at Phuttirungsiphiboon School, Chachoengsao.These sample were selected by simple random sampling method, and were divided into two groups with 30 students in each group. The experiment time was 16 periods of 50 minutes. Percentage and t-test were used as the statistical devices for the analysisi of data.The results of the study revesled thst that the instuctional packages, constructed by the researcher,had the average of 80.87/92.67 efficiency. This study indicated that the instructional packages had efficiency according to the standard criterion of 80/80 as set.The detailed efficiency of all the intructional packages were as follow :The first package's efficiency was 78/86.67 The second package's efficiency was 79.33/93.33The fourth package's eficiency of the students after learning from instructional packages was significently higher, at .01 level, than the of the students defore learning.