《长方体和正方体的认识》是苏教版小学数学六年级上册的教学内容,是在学生直观认识立体图形和系统认识平面图形的基础上展开教学的。这部分内容不仅是学生全面系统认识立体图形的开始,更是学生认识立体图形的核心内容,对学生空间观念的形成十分关键。因此教材十分重视通过观察、操作、讨论、整理等数学活 “Understanding of cuboids and cubes” is the teaching content of the sixth grade of the sixth grade of the Supiao version of primary school mathematics, which is based on the students’ intuitive understanding of the three-dimensional graphics and systematic understanding of the plane graphics. This part is not only the beginning of students ’comprehensive and systematic understanding of stereo graphics, but also the core content of stereo graphics for students. It is crucial to the formation of students’ space concept. Therefore, textbooks attach great importance to observation, operation, discussion, finishing and other mathematical activities