平面几何中的证明题,学生多感困难。能不能在较短的复习课中,摸索一些解题规律,如变换图形,观察联想,分析类比,引伸转化等,以提高学生的论证能力。笔者作了一些尝试,觉得题组教学是一种较好的复习形式。下面就谈一些我们的作法。一、编制“多题一律”题组,揭示一些解题的规律,掌握一些通解通法。例1 AB为 Proofs in plane geometry make it difficult for students. Can we explore some problem-solving rules in the short review class, such as transforming graphs, observing associations, analyzing analogies, and introducing transformations, etc., in order to improve students’ ability to argue. The author made some attempts and found that the group teaching is a good form of review. Let’s talk about some of our practices. First, compile a “multiple questions and one law” question group to reveal some rules for solving problems and master some general solutions. Example 1 AB is