开放教学首先需要开放题。然而,根据不少研究者对我国原有数学教材例题、习题状况的调查,发现“千人一面的机械练习”、“忽视应用与创新”等问题甚多,如今实施的课程标准的数学教材中开放题的比例已经得到很大的提高,但仍然需要教师在平时的教学中进一步去补充和拓宽,这是实施开放性教学的必需。 Open teaching first need open questions. However, according to many researchers’ investigation of the original math textbooks and exercises in our country, it is found that there are many problems such as “one side of the mechanical exercise”, “neglecting the application and innovation”, and the curricular standards The proportion of open questions in mathematics textbooks has been greatly improved, but teachers still need to further supplement and broaden their teaching in ordinary times. This is an essential part of implementing open teaching.