一直以来,培养学生的空间观念是“图形与几何”领域教学中教师的一项重要任务。如何在把握图形本质特征的基础上发展学生的空间观念?近日,笔者在“长方体的认识”一课的教学中,做了积极有效的尝试,点滴成效与大家共享。教学片段与解读片段一:当学生在实物图上认识了长方体面、棱、顶点等特征后,笔者在屏幕上出示了下图 It has long been an important task for teachers in teaching “Graphics and Geometry” to cultivate students’ spatial concepts. How to develop students’ concept of space on the basis of grasping the nature of graphics? Recently, the author made positive and effective attempts in the teaching of “Cuboid Cognition”, and made some achievements in sharing with others. Fragment and interpretation of teaching a fragment: When the students met in the physical map rectangular, prism, vertex and other features, the author produced the following screen on the map