组织开发地理课外活动 ,有利于增强学生学习地理的内驱力 ,更有利于提高学生对书本知识的接受性 ,使课内外知识互相促进、互相迁移形成积极的互辐射效应。但在开展地理课外活动时也经常会碰到课内外知识相互干扰的负面效应的现象 ,如 :学生通过“工矿企业对环境污染的调查”发 Organizing the development of geography extracurricular activities is conducive to enhancing students’ inner driving force in learning geography, and is more conducive to improving students’ acceptance of book knowledge, so that the knowledge inside and outside class can be mutually promoted and migrated to form an active mutual radiation effect. However, in the course of geography extra-curricular activities, they often encounter the negative effects of mutual interference of knowledge inside and outside class. For example, students pass the “investigation of environmental pollution by industrial and mining enterprises”.