《种大蒜》一课是人教版自然教材二册第一课,属于“植物”单元。本课分两部分,即观察大蒜和种植大蒜。是在进一步练习凭借感官观察事物的基础上,认识大蒜外部特征,并为中高年级进一步认识植物的根茎打下基础。因而,本课要达到这样的教学目的:学生通过观察、动 The lesson “Garlic” is the first lesson of the second edition of the Nature Teaching and Learningbook of the PEP, belonging to the “plant” unit. This lesson is divided into two parts, namely observation of garlic and planting of garlic. On the basis of further practicing the observation of things based on the senses, we can understand the external characteristics of garlic and lay the foundation for the further understanding of plant roots and roots in senior and senior grades. Therefore, this lesson to achieve such a teaching purpose: Students through observation, move