教材作为国家权威的普适性的教学范本,必不能完全兼顾到各地各校教学的特殊性,因此教学中对教材的“二次开发”有其必要性。所谓教材的“二次开发”主要是指对既定的教材内容进行适度增删、调整和加工,合理选用和开发其他教学材料,从而更好地适应具体的教育教学情境和学生的学习需求。然而,在平时的教学活动中,对教材内容的开发,却存在两种误区:一种是开发过度。这种情况往往出现在公开课或者评比课中,授课教师为了追求所谓的新 Teaching materials, as the universally applicable teaching model of state authority, must not fully take into account the particularity of teaching in all localities. Therefore, there is a necessity for teaching “secondary development” of teaching materials in teaching. The so-called teaching materials “secondary development ” mainly refers to the appropriate content of the textbook addition, adjustment and processing, the rational selection and development of other teaching materials, so as to better adapt to the specific education and teaching situations and students learning needs. However, in normal teaching activities, there are two kinds of misunderstandings about the development of teaching materials: one is over-development. This situation often appear in open class or competition class, lecture teachers in pursuit of the so-called new