On the basis of APOS theory proposed by Dubinsky, a famous mathematic educator, this paper proposed corresponding learning strategy for the concepts of discrete mathematics.
本文基于著名数学教育家杜宾斯基的APOS理论，提出相应的离散数学概念学习策略。
2
For additional guidelines concerning how to facilitate retrospective sessions, see our book (Hazzan and Dubinsky, 2008) and other books about the facilitation of retrospectives (e.g, Kerth, 2001).