In addition to the analyses of differences between web-based education and in-class instruction, we assessed the effect of web-based education as a supplement to classroom instruction (web-enhanced education) on students' scores of knowledge and skills and compared it with the web-based education itself. As expected, the knowledge score of students after web-enhanced education increased from 15.0 to 17.3, while the score of skill performance increased from 27.9 to 30.9. The Wilcoxon signed rank test revealed significant differences between web- based education and web-enhanced education groups, indicating that students obtained the highest scores when web-based education was used as a supplement to traditional classroom instruction.
Thus, hypotheses H3 and H4 were accepted (Table 2).