翻转课堂的实施主要包括课前、课中和课后三个环节。课前环节即前置学习,其效果是翻转课堂的教学效果的保障。但在实际教学中,许多教师表示自己的课堂根本翻转不过来,主要原因是对前置学习活动缺乏引导和质量监控。笔者根据翻转课堂的前置学习的“学生个体”“学习内容”“学习环境”“学习资源”和“评价反馈”五个基本因素,设计的基于翻转课堂的前置学习活动的流程包括“知识学习”和“学习评价与反馈”两个主要环节,以中职《图形图像处理》课程为例开展了教学实践,并总结了保证基于翻转课堂的前置学习活动教学效果的注意事项,以期为基于翻转课堂的前置学习活动的设计提供借鉴。 Flip classroom implementation mainly includes three stages before class, after class and after class. Pre-course links that pre-learning, the effect is to flip classroom teaching effectiveness of protection. However, in the actual teaching, many teachers said that their classrooms can not be overturned. The main reason is the lack of guidance and quality control of pre-learning activities. According to the five basic factors of “learning individual”, “learning contents”, “learning environment”, “learning resources” and “feedback of evaluation” The process of pre-learning activities includes two main aspects of “knowledge learning” and “learning evaluation and feedback”. The teaching practice is carried out by taking the course of “graphic image processing” in secondary vocational school as an example, Pre-learning activities in the classroom Notes on teaching effectiveness with a view to providing a reference for the design of pre-learning activities based on flipped classrooms.