In this study, the researcher developed the instrument to measure the level of adolescents’ perceived knowledge and awareness on cyber-bullying. This instrument is known as the Cyber-bullying Knowledge and Awareness Instrument (CBKAi). It was used as the pre-test and post-test of this study. CBKAi consists of 28 items. 10 items will be utilized to access the level of knowledge that the students posses in understanding the characteristics, method and the nature of cyber-bullying. Another 18 items is used to measure the level of awareness that the students have regarding the consequences of cyber-bullying, coping strategy of cyber-bullying and steps to prevent the growth of cyber-bullying among teenagers.