随着主题背景下区域游戏的深入开展,教师对于游戏的观察与指导也有了重新的认识:实施教育,观察先行。但对于观察中介入指导的时机一直是教师所困惑的,介入多了,便占了主导位置,成为隐形的导演;介入少了,幼儿就会天马行空,嬉戏行为增多。介入是教师指导幼儿游戏的关键因素,应如何把握介入与否的适宜时机呢? With the deepening of regional games under the theme background, teachers also have re-understanding of the observation and guidance of the game: implementing education and observing the precedent. However, the timing of intervention in the observation has always been confusing teachers, and more intervention, they take the dominant position, become a director invisible; intervention less, children will be abstract, playful behavior increased. Intervention is a key factor for teachers to guide children’s games. How should we grasp the appropriate time to intervene?