一、教学内容分析本课是小学科学五年级(上册)第二单元第九课内容,本单元是在“生物生长的需要”单元的基础上,继续围绕“作用与平衡”这一概念,引领学生探究 First, the teaching content analysis This course is the fifth grade primary school science fifth grade (the second volume), the unit is based on the “biological growth needs” unit, continue to focus on the “role and balance” A concept to lead students to explore