“取材”与“拓展”是数学教学必须重视的,能够帮助学生更深入地掌握知识,取得良好的教学效果。数学学习的材料要从学生的现实生活中提取,材料要与本节课的教学目标和教学内容相联系,材料的组合要有逻辑联系:或对比、或延伸、或迁移、或补充……。根据小学生认知和情感的特点,结合我多年来的 “Drawn ” and “Expansion ” are the important points that math teaching must pay attention to, which can help students master the knowledge in depth and achieve good teaching results. Mathematic learning materials to be extracted from the students’ real life, the material to be linked with the teaching objectives and teaching content of this lesson, the material combination must have a logical connection: or contrast, or extension, or migration, or supplement .... According to the characteristics of pupils cognitive and emotional, combined with my years