预设与生成是课堂教学两个不可或缺的环节,预设是教学的起点,它对整个教学活动有目标性的指导作用;生成则是在整个教学活动的进程中,通过教师、学生共同的生命体验而动态生成的学习成果。作为相互依存的一对矛盾体,它们的同一性都是达成课堂教学优质高效的重要手段,而且课堂的有效生成往往取决于精心的教学预设。然而,什么样的预设可以达成优质高效的课堂生成呢,相信许多一线教师都曾有过或 Presupposition and generation are two indispensable links in classroom teaching. Presupposition is the starting point of teaching. It has a guiding role for the entire teaching activities; generation is in the process of the entire teaching activities, and is shared by teachers and students. Life experiences and dynamically generated learning outcomes. As an interdependent pair of contradictions, their identity is an important means of achieving high quality and efficient classroom teaching, and the effective generation of the classroom often depends on meticulous teaching presupposition. However, what kind of preset can achieve high quality and efficient classroom production, I believe many frontline teachers have had or