Connecting Teaching Between Junior High School and Senior High School Based on Students' Thinking Development:Relative Atomic Mass
SUN Guo-Hui1, SUN Lei1,2**, LIU Lai-Quan3, ZHENG Chang-Long2
1. High School Attached to Northeast University, Changchun 130021,China;
2. Institute of Chemical Education, Northeast University, Changchun 130024,China;
3. Basic Education Research Center of Changchun Education Bureau, Changchun 130021,China
