Unit 3 Science versus nature教學設計（表格式）
step ii readingt: now let’s read the first passage and answer the following questions, while i will play the tape for you to listen, eight minutes are given.after eight minutes, check the answers.one nanotube could be put together with other nanotubes to make a material 100 times stronger and four times lighter than steel. we could use this material to build better cars and airplanes.t: you did a very good job. now let’s listen and read about the second passage about stem cell research and answer the following questions as well. eight minutes are given.suggested answers to reading b: stem cells are different from other kinds of cells because they have the ability to change into many different kinds of cell types such as muscle cells, bone cells or brain cells.t: now we’ll learn how to write a persuasive argumentstep iii writingafter 3 to 5 minutes, ask several students to express their ideas.