与以往的教材相比,北师大版义务教育课程标准实验教科书在第一学段的空间与图形方面,改变了以“线段、角;相交、平行;三角形;四边形;圆”为章节呈现几何内容的处理方式,而是以“图形的认识、测量、图形与变换、图形与位置”为四条线索将其自然展开,以培养学生空间观念、几何直? Compared with the previous textbooks, Beijing Normal University version of compulsory education curriculum standard experimental textbook in the first paragraph of the space and graphics, changed the “line, angle; intersection, parallel; triangle; quadrilateral; circle” as the section presents geometry Content processing, but to “understanding of graphics, measurement, graphics and transform, graphics and location” for its four clues to expand its natural to cultivate students space concept, geometry straight?