教材中知识点的形成、习题的选取都是经过编者反复揣摩和精心挑选的,蕴涵着解决问题的思维方式和方法。然而教学中,受时间、精力等诸多因素制约,部分教师“丢”教材“拾”教辅,漠视编者的智慧和心血,用教材而怨教材,学教材却累于教辅,舍本求末,苦不堪言,弱化了习题的导向功能。笔者以人教版《义务教育教科书·数学》七年级下册第五章“相交线 The formation of knowledge points in the textbooks, exercises are selected repeatedly by the editor to try to figure out and carefully selected, contains the way of thinking to solve the problem and methods. However, in teaching, due to time and energy constraints and many other factors, some teachers ”lost “ textbook ”pick “ supplementary, ignoring the editor’s wisdom and hard work, with textbooks and complain about textbooks, Attempting to seek the end, miserable, weakening the guiding function of exercises. The author of People’s Education Edition ”compulsory education textbooks · Mathematics“ seventh grade Volume fifth chapter ”intersecting line