Development Computer-Assisted Instruction on Compensation Offset Dimension Cutting Tools in NC Program of CNC Lathe

Abstract

The objective of this research were to develop computer-assisted instruction on compensation offset dimension cutting tools in NC program of CNC Lathe, to meet the efficiency set up which was not less than 80 percentage, and effectiveness index of computer-assisted instruction set up not less than 0.50, as well as to compare the students learning achievement prior to and after learning with computer-assisted instruction on compensation offset dimension cutting tools in NC program of CNC Lathe.
The samples used in the research were forty 3rd year undergraduate students, majoring tools engineering at the faculty of engineering, King Mongkut’s university of technology Thonburi selected by simple random sampling.
The instruments used in this research were computer-assisted instruction on compensation offset dimension cutting tools in NC program of CNC Lathe, and four multiple choices achievement test of 30 questions with the Index of item objective congruence (IOC) between 0.67-1.00, the degree of difficulty (P) between 0.45-0.80, the degree of discrimination (r) between 0.32-0.87 and the reliability coefficient of 0.77.
The result of this research were found that the computer-assisted instruction on compensation offset dimension cutting tools in NC program of CNC Lathe had efficiency (E-CAI) at 81.10, effectiveness index (E.I.) at 0.804 Which follow the criteria set up. The other result also indicated that the students achievement after learning with computer-assisted instruction on compensation offset dimension cutting tools in NC program of CNC Lathe. was statistically higher than prior to learning at 0.05 level.