课堂教学是一个动态的不断发展和推进的过程。这个过程既有规律可循,又有灵活的生成性和不可预测性。布卢姆说过:“没有预料不到的成果,教学也不就成为一种艺术了。”科学课中的每一个生成资源都是鲜活的,科学课堂中学生的一个错误的回答、一个意外的问题、一段文字、一个良好的气氛等 Classroom teaching is a dynamic process of continuous development and promotion. This process follows the rules and has a flexible generative and unpredictable nature. Bloom said: “Without unexpected results, teaching is not art anymore.” Every generational resource in the science class is alive and well, a wrong answer for students in the science class, An unexpected question, a paragraph of text, a good atmosphere and so on