课题 :Comparing things 日期 2.6教学内容：Comparing the masses of the different objects 教学目标：1. Let the students know the definition of the mass.2. The student can compare the masses of the things教学重点：Understand words: “heavier” and “lighter” 教学难点：The important sentence “A is as heavy as B”教具准备：Balance, apple, orange, ball and marble教学过程：一、 Lead inWatch the pictures.Say the name of the animal. Can you tell me which animal is bigger? Can you tell me which is heavier? 二、 Mass:重量Introduce the balance(the teacher)Show the flash about the balance.三、 Have a discussion(the students)1. The cow and the lionWhich is heavier? Explain: Heavy重 heavier比较重的Light 轻 lighter 比较轻的 2. The bird and featherWhich is lighter?四、 Do the activity.Say your favorite things,then compare the mass with your classmate.五、 ExperienceCompare the apple and orangeHave a discussion (as heavy as 一样重)In conclusion: The apple is as heavy as orange.六、 Application1. let three groups of the student to use balance to compare the mass of some things.2. let them say the sentence.3. Exercise:P7,9.七 板书The lion , the cowWhich is bigger? Which is heavier?The bird the feather Which is lighter?Im light Im lighterThe apple the orangeThe apple is as heavy as the orange.八、教学后记通过生动活泼的图片引入物体的重量，会用正确的重，更重，轻，更轻准确表述物体质量轻重，调动学生主动性，表演不同动物，学会比较重量的语句。以后要更加加强学生语言的表达。