传统课我们称之为“封闭课”,是因为它有:单一而封闭的教学内容、单一而封闭的教学方式、单一而封闭的教学空间、单一而封闭的评估手段。针对“封闭课”的“封闭”,我们开展了中学历史“开放课”的教学实验。主要内容包括“开放”学生的认识和体验,让学生尽可能结合自己的认知 The traditional lesson we call “closed class” is because it has: single and closed teaching content, a single and closed teaching method, a single and closed teaching space, and a single and closed assessment method. For the “closed” of the “closed class”, we carried out the teaching experiment of “open class” in middle school history. The main content includes the understanding and experience of “open” students, allowing students to combine their knowledge as much as possible