公开课的教学设计往往是精彩的、有效的,它凝聚了开课教师、教研组及相关教学研究人员的心血,集中了大家的智慧,通过反复研讨、修改、试讲、试上等环节生成的。但即便是这样,有时也难免有不足与遗憾。我曾开过《勾股定理的应用》第1课时的一节 Open class teaching design is often wonderful and effective, which embodies the teachers, teaching and research group and related teaching and research staff’s efforts, focus on the wisdom of everyone, through repeated discussions, modify, test, try on other links generated. But even then, there are inevitably shortcomings and regrets. I had a section on Lesson 1 of the “Pythagorean Theorem.”