运用五层次教学结构进行平行四边行概念教学贺兰县四十里店学区丁北小学秦永贵小学生掌握概念必须借助观察，通过比较、分析、综合、概括等思维过程来完成。五层次教学的结构特点，符合学生的认识规律，与理解掌握概念的过程相吻合，为概念教学提供了较科学的教学方法．一... The use of five levels of teaching structure for the parallel teaching of the concept of four-sided line Helan County Shijiadian District Dingbei Elementary School Qin Yonggui Primary school students master the concept must be observed, through comparison, analysis, synthesis, generalization and other thinking process to complete. The structural features of the five-level teaching are in line with the students’ understanding of the rules and are consistent with the process of understanding and mastering the concepts, and provide a more scientific teaching method for the concept teaching. one...