The purposes of the research were to create and efficiency validation of computer assisted instruction focused on the practice to CNC Tuming of the standard 90 / 90 and analyse the student leaning achievement of the student after by using computer assisted instruction.The subjects in the study were 23 first year diploma students enrolled in Computer Numerical Control Rajamangala of Technology. North Bangkok Campus. The Researcher using the experiment by let the students do until test before class. And then study by using computer assisted instruction focused on practiced to CNC Turning. After that let students do the unit test again at the class and calculate to find out the efficiency of the computer assisted instruction and analyse the leaning achievement of students after study. The research result revealed that the efficiency of the computer assisted Instruction was efficient in standard 90 /90 Moreover after learning achievement At significant level of 0.01

The purposes of the research were to create and efficiency validation of computer assisted for the courses of practiced disassembly and assembly fuel injection nozzles of Diesel Engine based standard 90/90 and analyse the learning achievement of the student after by using computer assisted instruction. The subjects in the study were 11 second year diploma students enrolled in Mechanical Power Department Rajamangala University of Technology Phra Nakhon. The Researcher using the experiment by let the students do until test before class and then stUdy by using computer assisted instruction focused on practiced disassembly and assembly fuel injection nozzles of Diesel Engine. After that let students do the unit test again at the class and calculate to find out the efficiency of the computer assisted instruction and analyse the learning achievement of students after study. The research result revealed that the efficiency of the computer assisted instruction was efficient in standard 90/90. Moreover after learning achievement at significant level of 0.01.

The purposes of the research were to create and efficiency validation of computer assisted for the courses of practiced to make body of ornaments based standard 90 / 90 and analyse the leaning achievement of the student after by using computer assisted instruction The subjects in the study were 17 first year diploma students enrolled in Rajamangala University of Technology Phra Nakhon. The Researcherusing the experiment by let the students do until test before class and then study by using computer assisted instruction focused on practiced to basic turning. After that let students do the unit test again at the class and calculate to find out the efficiency of the computer assisted instruction and analyse the leaning achievement of students after study. The research result revealed that the efficiency of the computer assisted Instruction was efficient in standard 90 / 90 Moreover after learning achievement At signifecant level of 0.05.

The purpose of the research were to create and efficiency validation of computer assisted for the courses of practiced to basic file based standard 90/90 and analyse the leaning achievement of the student after by using computer assisted instruction The subjects in the study were 17 first year diploma students enrolled in Rajamangala University of Technology Phra Nakhon. The researcher using the experiment by let the students do until test before class And then study by using computer assisted instruction focused on practiced to basic turning. After that let students do the unit test again at the class and calculate to find out the efficiency of the computer assisted instruction and analyse the leaning achievement of students after study. The research result revealed that the efficiency of the computer assisted instruction was efficient in standard 90/90 Moreover after learning achievement at significant level of 0.05

The purposes of the research were to create and efficiency validation of computer assisted for the courses of practiced to reading Micrometer 0.01 m.m. based standard 90 / 90 and analyse the leaning achievement of the student after by using computer assisted instruction. The subjects in the study were 17 first year diploma students enrolled in Rajamangala University of Technology Phra Nakhon. The Researcher using the experiment by let the students do until test before class And then study by using computer assisted instruction focused on practiced to basic turning. After that let students do the unit test again at the class and calculate to find out the efficiency of the computer assisted instruction and analyse the leaning achievement of students after study. The research result revealed that the efficiency of the computer assisted Instruction was efficient in standard 90/90 I Moreover. after learning achievement At significant level of 0.05