Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 기술가정1.가정1-6차시. 청소년의 인지발달. That video is uploaded by 소라티 at 2020-05-21T16:19:54-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [qg9_DWeT62o]