The purpose of this research is to develop a multimedia computer lessons about Sukhothai history for grade 4 to find out the effectiveness of educational development for multimedia computers to compare the performance of students learning using multimedia computer lessons and teaching the normal and satisfactory for students after school.
The result found that the efficiency of the developed on the efficiency of this Computer Multimedia Instruction is 87.66/83.00 which was higher than the criterion at 80/80, The After using the Computer Multimedia Instruction learners’ learning achievements were higher than those of pretest at .01 level of significant and the satisfaction of t students was good (x ̅= 4.25, S.D. =0.81). In conclusion, that can be used the developed Computer Multimedia Instruction properly.
Keywords Computer Multimedia Instruction, Efficiency, Achievement, Satisfactory