九年义务教材小学自然第二册《影子》一课,按照游戏、实验、课后观察,可分为四个部分.通过这些内容让学生掌握影子产生的条件及影子长短、方向变化,同时初步培养学生的实验能力.因此,在教学设计中,我依照教材结构,设计了以培养学生观察、实验为主线,以电教媒体和传统媒体相结合为手段的四步教学. The nine-year compulsory primary school nature booklet “shadow” a lesson, according to the game, experiment, after-school observation, can be divided into four parts. Through these content allows students to grasp the shadow of the conditions and shadow length, direction changes, Therefore, in the teaching design, according to the structure of teaching materials, I designed a four-step teaching to cultivate students' observation and experiment as the main line, combining audio-visual media with traditional media.