The objectives of this research were as follows: 1) to develop the computer assisted instruction (CAI) on technology (computing science) subjects for grade 3 students, 2) to evaluate the content’s quality of the CAI on technology (computing science) subjects for grade 3 students, and 3) to evaluate the quality of the technique and methodology of the CAI on technology (computing science) subjects for grade 3 students. The target group used in this research were 5 experts in the content, and 5 experts in the technique and methodology selected by purposive sampling technique. The instruments used in this research were the learning plan, the CAI, the content assessment forms, and the technique and methodology assessment forms. The statistical data used in the analysis were mean and standard deviation.

            The research findings showed that: 1) the CAI on technology (computing science) subjects for grade 3 students consisted of 3 units which were problem solving in daily life, algorithm representation, and the example of solving Tetris, 2) the CAI on technology (computing science) subjects for grade 3 students had the quality of the content at a high level (  = 4.35, S.D. = 0.33), and 3) the CAI on technology (computing science) subjects for grade 3 students had the quality of the technique and methodology at the highest level (  = 4.55, S.D. = 0.29). The evaluation results of the CAI from the experts showed that all of the experts accepted the developed CAI. It could be concluded that the developed CAI could be used for self-directed learning for grade 3