Learning Difficulties of Periodic Table and Law of Elements Based on Students' Cognitive Structure Exploration
CUI Jun-Li1, YAN Chun-Geng2, LU Shi-Huan1, ZHOU Qing1,3
1. School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China;
2. Teacher Education Development Center, Northwestern Polytchnial University, Xi'an 710072, China;
3. National Innovation Center for Assessment of Basic Education Quality, Beijing Normal University's No.34 Sub Center Shaanxi Normal University, Beijing 100875, China
