. First, Class 3-C was excluded from the main study because it had already implemented facilitative teaching prior to the main study period. The Class 3-C that have taken during six weeks with Facilitative Teaching Style differ psychologically in the degree of impact due to style factor. As a result, there is a limit to determine the effect of purely ARCS Model on motivation. Therefore, if included, Class 3-C would have been outside the parameters set by the researcher for the application of the ARCS Model in the main study's two classrooms: Class A and Class B.