【知识背景】《制作礼品盒》是苏科版的实验教材七年级上册第三章《走进图形世界》的一节数学活动课,学生在学习了“展开和折叠”之后,对长方体的表面及其展开图的关系已有了一定的认识,本节课要让学生通过亲自动手设计、操作,加深对这一关系的理解,丰富其空间观念,发展空间想象能力。同时,让学生经历“实际问题数学化—建立数学模型—用数学知识解决问题”的过程,获得研究问题的方法和经验,通过克服困难的经历和获得成功的体验,培养学生 【Knowledge background】 “making gift box” is the Suke version of the experimental textbook seventh grade on the third chapter “into the graphics world,” a section of mathematics activity class, students learn “expand and collapse ”, the cuboid The surface and the expansion of the relationship between the map has been a certain understanding of this class to make students hands-on design, operation, deepen the understanding of this relationship, enrich their space concept, the development of spatial imagination. At the same time, students should experience the process of “mathematicalization of practical problems - establishment of mathematical models - solving problems with mathematical knowledge”, acquire methods and experiences in problem solving, and train students by overcoming difficult experiences and obtaining successful experiences