For last 10 years or so, we have been practicing class session through incorporation of “blended learning”. Such class sessions are generally divided into 3 types which are lecture, exercise and experiment. We have been examining utilized media, change in awareness related to ability, useful activities, etc. for such classes. We will be taking up 10 subjects among such classes and will compare the utilized media in the class by comparing the class development. For 30 items that have common awareness, we will conduct significance test and will compare the difference between the subjects. By using the average rating score of pre/post survey of such awareness, its elongation, and the number of activities, we will conduct principle component analysis, and will conduct cluster analysis by using principle component score, and will examine the cause of difference by categorizing the subject. Correlation analysis is conducted using principal component scores to find relation between three kinds of principal component scores. The results of these analysis indicate the following findings. Awareness improves in the order of group “experiment type class”, “exercise type class”, and “lecture type class.” Awareness of "experimental type class" gave indication of greater elongation than that of "exercise type class" and "lecture type class". Awareness of subjects improves mostly in order of Group "experimental type class", "exercise type class", and "lecture type class". As the experience oriented activity time gets longer, the improvement in awareness is increased.

blended class, class type, class development, utilized media, change of awareness, principal component analysis, cluster analysis