2) Use Frequency of WBT Teaching Materials
The WBT use frequency according to the class is as shown in Table 1 and Figure 5. The use frequency of the WBT teaching materials is a frequency in which HTML files other than a table of contents of the WBT teaching materials are displayed. The class of HTML and C language was compared as a result of T authorization, and there was no significant difference in the profit use frequency of the WBT teaching material.