直观教学法是以亲身实践或具体事物、现象以及对事物现象的具体描述,来激起学生的感性认识,获得生动的表象,从而促进学生对知识全面、深刻的掌握和理解的一种教学方法。同时,直观教学也是生物教学中最重要的教学原则之一。开展多种形式的直观教学,能取得良好的教学效果。%Intuitional instruction is a kind of teaching method which is used to motivate students" perceptual cognition and acquire vivid presentation based on hands-on experience or specific description of phenomena, thus to promote students' full and profound gra
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