THE DEVELOPMENT OF WEB – BASED INSTRUCTION FOR REVIEW ON USE OF FORMULA AND FUNCTION FOR VOCATIONAL CERTIFICATE

Abstract

The purposes of this study were 1) to develop and evaluate the quality as well as the efficiency of web-based instruction for review on the use of formula and function for high vocational certificate students, and 2) to compare pre-test and post-test learning achievement of the students before and after the experiment. The research instruments were the web-based instruction for review on the use of formula and functions, WBI evaluative questionnaire and the achievement test. The samples in this study were 80 vocational certificate students in the academic year 2014 selected by cluster random sampling which were divided into two groups, first group of 40 students for efficiency testing of WBI instrument and second group of 40 students for achievement comparison between pretest score and posttest score. The statistics used in the analysis were mean (), standard deviation (S), and t-test for Dependent Samples. The Index of congruency (IOC) was between 0.67 – 1.00 while the level of difficulty (p) was between 0.40 – 0.70; the discrimination (r) was between 0.35 – 0.70 while the reliability (KR 20) was at 0.75. The result found that the quality of web-based instruction for review lessons was at an excellent level (=4.74, S =0.01). It is also found that the content of the lesson was at an excellent level (=4.90, S = 0.22) in addition, the technical and media production was at an excellent level (=4.57, S = 0.24). The efficiency of web-based instruction lessons (E 1 /E 2 ) was 82.08 /82.50 respectively in correspondence with the criteria that it should not be less than 80/80 when comparing to the overall learning achievement of e-learning and past revealed that post-test achievement is higher than that of pre-test at 0.05 significant level.