The purposes of the research were to create and find efficiency validation ofcomputer assisted instruction focused on the mold plastic injection making kind two plate for the standard 90/90 and analyze the students learning achievement after using computer assisted instruction. The samples were the 15 first year diploma tool & die students Rajamangala Institute of Technology North Bangkok Campus. The researcher experimented by using pretest and then using the computer assisted instruction focus on the mold plastic injection making kind two plate mold base make mold and adjust next the students did the posttest. After that the researcher calculated to find the computer assisted instruction efficiency and analyzed the students learning achievement after studying. The result revealed that the computer assisted instruction efficiency was efficient for standard 90/90. And after studying by using computer assisted instruction the students learning achievement increased significantly at 0.05.

The purposes of the research were to create and find efticiency validation of computer assisted instruction focused on the fundamental of welding for the standard 90/90 and analyze the students learning achievement after using computer assisted instruction. The samples were the 20 first year Bachelor of Engineering Program in Industrial Engineering Rajamangala University of Technology Phra Nakhon. The researcher experimented by using pretest and then using the computer assisted instruction focus on the fundamental ofwelding and analyzed the students learning achievement after studying. The result revealed that the computer assisted instruction efficiency was efficient for standard 90/90. And after studying by using computer assisted instruction the students learning achievement increased significantly at 0.05.

The purposes of the research were to create and find efficiency validation of computer assisted instruction focused on the practice to record data for report writing for t Ie standard 90/90 and analyze the student learning achievement after using (computer assisted instruction. The I samples were the 20 first year Bachelor of Science in Technical Education st~dents enrolled in Industrial Engineering Rajamangala University of Technology fhra Nakhon North Bangkok Campus. The Researcher experimented by using prete~t and then using the computer assisted instruction focus on the practice to Iprepare specimens in learning next the students did the posttest. After that the resrarcher calculated to find the computer assisted instruction efficiency and analyzed:! the students leaning achievement after studying. The result revealed that the computer assisted Instruction efficiency was efficient for standard 90 / 90. And after studying by using computer assisted instruction tme students learning achievement increased significantly at 0.05.