http://baigiang.violet.vn/present/same/entry_id/7133786 gdcd hòa
http://pgdbinhlieu.edu.vn/index.php/vi/download/Sang-kien-kinh-nghiem/KHAI-THAC-TINH-NANG-DONG-CUA-HOC-SINH-GAY-HUNG-THU-TRONG-GIO-HOC-MON-GDCD-O-TRUONG-THCS-THONG-QUA-PHUONG-PHAP-TRO-CHOI/ hiệp
