前置性学习是学生在一定目标指导下的自主学习,它是在传统的预习的基础上,拓展了内容,学生通过先学对新知识有了初步感受和浅层理解,为新课学习做预备、做铺垫、做指引,从而更有目的性地进行课堂学习,提升课堂教学的有效性。在前置性学习过程中通过微视频,可以解决教师不在现场的问题,教师提 Front-end learning is self-directed learning under the guidance of a certain goal. It is based on the traditional preview, and expands the content. Students learn first-hand knowledge and shallow understanding of new knowledge by learning first, and learning for the new class. Prepare, pave the way, and make guidelines so as to conduct classroom learning more purposefully and improve the effectiveness of classroom teaching. Through the use of micro-videos in the front-end learning process, teachers can solve the problem that the teacher is not on the scene.