高二英语十三单元课件 人教版 课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,The,properties,of,water,HuiHua,Middle School,English is a bridge to the world.,Made by,CuiZhi,说课稿结构,Part one:The teaching material,Parttwo:Teachingmethods,learning,guidance and aids,Part three:Teaching proceduresPart four:Comments and evaluation,Part one:The teaching material,A.contents and status of the teaching material,Unit13 is about water,so all the teaching materials chosen are about water,.,This lesson describes the properties of water,such as its chemical structure,density,heat capacity etc.As a reading passage,it plays an important part in this unit,for reading is one of the four skills that the students should have.In this reading passage,the teacher should help the students get some knowledge about the properties of water.Meanwhile,the students are required to improve their reading skills by skimming,scanning and doing different kinds of exercises,1.,knowledge goals,words:cube,property,range,medium,relatively,dissolve,pure,relationship,mass,absorb,bottom,phrases:all the way,that is,add to,mix with,take,advantange,of,manage to do,sentences:,1)but the way the water molecule is formed gives water its unique properties.,2)With the right kind of body,it is possible to float around in the ocean and let the water do the work.,B.teaching aims,and demands,B.teaching aims and demands,2.ability goals,1)improve the studentsreading ability,2)teach the students how to grasp the main,idea of the text,3.emotional goals,Enable the students to realize that it is important,to protect and save the water on our planet.,c.teaching important points,1)develop the students reading,skills,eg,how,to find the topic sentence of each paragraph.,2)enable the students to grasp the above,vocabularies and sentence patterns,3)improve the students awareness of saving water,D.teaching difficult points,How to make the students understand,the reading passage better,Part two:Teaching methods,learning guidance and aids,A.teaching methods,1.,multimedia method to arouse the Ssinterests,2.skimming,scanning,task-based method to,impove,the studentsreading skills,3.student-centered method to motivate the students activeness,4.success-experiencing method to encourage the Ss and make them feel the joy of success,B.studying ways,learning through cooperation,learning through communication,learning through practice,C.teaching aids,the multimedia,the recorder.,Part three,Teaching procedures:,Step1.lead-in(4minutes),Show some pictures to let the students say something about water.and ask the students to take a little quiz about water(to arouse the Ssinterests and draw their attention to the following text),The earth,revision,44,The usage of water,entertainment,Water can be used for agriculture,The,dalian,of china,transport,Quiz time:,Up to _ of the human body is water.,A.60%B.65%C.70%,2.About _ of the earth surface is covered by water.,A.66.6%B.75%C.85%,3.The water molecule is made up of _ atom(s),and _ atom(s).,A.two hydrogen;one oxygen,B.one hydrogen;one oxygen,C.two hydrogen;two oxygen,step2 pre-reading(,2m),Ask the students to read the title of the text and say some,properties or characteristics of water,What properties or characteristics do you know about water?,colorless,tasteless,having no fixed shape,three forms,feeling wet,keeping level,?,absorbing heat,properties,step3 while-reading,skimming,scanning,task-based(25m),1.skimming,:try to find the topic sentence of each,paragragh,para1,.introduction:the properties of water make the ocean a great place to live.,Para2.,the chemical structure of water makes it a excellent medium for life,Para3,the salinity of sea water affects both its weight and,freening,point.,Para4,marine animals and plants take advantage of the density of water.,Para5,the heat capacity of water keeps the,temperture,of the ocean steady,making it a safe and,comfortabale,habitat.,Para6,.ocean motion adds energy to the marine ecosystems and moves nutrients around.,1.skimming,2.scanning,ask the Ss to scan the text to finish,ture,or false questions,scanning:the properties of water,Water is a liquid at room temperature,and it has a relatively high freezing point.,The reason why water can dissolve most substances on earth is that water has high heat capacity.,Like all the other substances,water gets smaller when it freezes.,Pure water has a higher freezing point and lighter than salt water.,The salinity of the earths oceans is about 3.5%.,When water freezes,its density increases.,T,F,F,T,T,F,True or false,2.ability goals,1)improve the the studentsreading ability,2)teach the students how to grasp the main,idea of the text,3.emotional goals,Enable the students to realize that it is important to protect and save the water on our planet.,Careful,Reading,Comprehension,(para1),About _years ago,life on our planet began in the deep blue seas.,_of the living space on earth is in the ocean.,In the Ocean there are about _ species.,Life in the ocean ranges from _to _,3 billion,99%,5 million,plankton,giants like sharks and whales.,Waters unique chemical structure,Water is polar.(,slightly,positive,&,negative,),Water is liquid at room temperature.,Water has a relatively high freezing point.,Function,:,It can break down both solids and gases.,It can provide nutrients for marine lives,Comprehension,(para2),Chemical structure:,Salinity,Salinity of sea water:,sea water(salt water),=_+_,mixed with_,salinity of sea water affects,:_and_,dissolved solids,dissolved gases,pure water,weight,freezing point,35,Comprehension,(para3),如果有了适宜的体型结构,他们就能让水帮助他们在海洋里浮游,.,Sentence understanding:,With the right kind of body,it is possible to,float around in the ocean and let the water,do the work.,1,000 kg/m,3,Comprehension(Para4,),Density,Density of pure water,:,What is density:,Density is the relationship between mass and volume and is measured in,kilogrammes,per,cubic,metre,.,Why can the man float on sea water?,Heat capacity,Comprehension(Para5),How does the water work to keep the,temperature of the earth steady?,Concept:,Heat capacity is the amount of energy it takes to raise the temperature of a substance by one,degree centigrade.,The water in the oceans keeps the temperature of the earth steady,by,absorbing and giving off heat.,Q1:,How does the water in the ocean move?,Dense water sinks and less dense water,is pushed to the surface.,Comprehension(Para6),Ocean motion,Q2:,What are the functions of the ocean,motion?,It adds energy to the marine ecosystems,and moves nutrients around.,play the tape for the Ss to listen and follow,meanwhile,the teacher goes among the Ss and correct any mistake the Ss made in pronunciation,stress and intonation.,4.listening and reading aloud,5.group work,The teacher make the students work in groups to conclude what are the properties of water,and then one of them report their work;finally the teacher show what they said on the Bb,What are the properties of water?,Water is polar.,Water is liquid at room temperature.,Water has a relatively high freezing point.,Water has density of 1,000 kg/m3.,Water has high heat capacity.,step4.Application(5m),Make the students to apply what they learnt in the book to reality.,The coastal areas are often neither too hot,nor too cold.,We can get a lot of nutrients in the soup.,When the sea water in a container is,evaporated(,蒸发,),there will be some salt,left.,Wood floats on water while iron sinks.,Some marine lives can live at the bottom,of the ocean where there is no sunshine.,What properties of water are these phenomena related to?,Application,heat capacity,chemical structure,salinity,density,Ocean motion,watch a flash(a drop of water)and have a discussion to improve the studentsawareness of saving water.,step5.discussion(7m ),Comprehension,Watch a flash,a dropof,water,What do you know from the flash?,What should we do from now on?,1.review the passage and prepare for language study on page21,2.invesigate the theme,are you friendly to water?,Step6.,Homework,(2m),How do you use water,Are you friendly to water?,1.Do you turn-off the tap while brushing your teeth?,A.Always B.sometimes C.never,2,2.How long does it take you to take a shower?,A.8minutes B.15 minutes C.30minutes,3.Do you have leaking taps in your house?,always B.sometimes C.never,4.Do you throw rubbish into lake/river/sea?,always B.sometimes C.never,5.Does your mother/father empty cooking oil in the kitchen sink(,水槽,),?,A.Always B.sometimes C.never,Part ments and evaluation,Teachers should employ proper teaching methods and techniques to satisfy the Ssneeds.They are in great need of instructions on how to be a successful language learners.My lesson plan is based on this principle.Multimedia teaching method will certainly arouse the Ssinterest and skimming,scanning,task-based method prove effective to,impove,the students reading skills.Meanwhile,I use success-experiencing method to encourage the Ss and make them feel the joy of success,.,Thank you,