Abstract

             The Development of Computer-assisted Instruction of Social Studies Subject on Civil and Criminal Law for the 3^rd Secondary School Students of Ramkhamhaeng University. Its objectives were 1. to develop of the Computer Assisted Instruction (CAI) for these students in this school, 2.  to study the satisfaction in the development of computer assisted instruction (CAI) and 3. to compare of the educational achievement pre-learning and post-learning of the students in this school.

Findings were as follows:

             1. The effectiveness of the Computer Assisted Instruction (CAI) E₁= 84.92 / E₂ =85.07 went on the standard 80/80 from the samples of the 3^rd Secondary School Students of Ramkhamhaeng University.

             2. The satisfaction of the students in this school with Computer-assisted Instruction (CAI) was at the high level (means=3.96)from the samples of the3^rd  Secondary School Students of Ramkhamhaeng University.

             3. The comparison of  the learning  achievement which its result was equal to 25.52 After learning, its achievement was higher than before learning, because its achievement was equal to 1.25 at the significant statistics 0.05 from the samples of the of the 3^rd  Secondary School Students of Ramkhamhaeng University.

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