The Third PeriodThe General Idea of This PeriodIn this period were going to learn another reading passage.Teaching Aims1.Learn and master the following words and expressions:rustboil ordinarysteamfloatformdissolveadd tokeep out of2.Learn to describe a simple scientific experiment.Teaching Difficult Points1.Enable the Ss to write a report on a scientific experiment.2.Learn to use the new words and expressions in this part.Teaching MethodsReading,question and answer.Teaching Aids1.a tape recorder2.a computer3.some test tubes,nails,Bunsen burner,balance,tongsTeaching ProceduresStep 1 GreetingsGreet the whole class as usual.Step 2 RevisionShow the metals learned in the last period to the class and ask them to name them in English.Step 3 PresentationRead the passage to find the answers to the questions.1.Whats the aim of the experiment?2.What equipment do we need in order to do the experiment?3.How long does it take to see whether iron rusts in the three cases?4.How can we take the air out of water?5.How can oil prevent air entering water?(Show the questions above on the screen.)Step 4 ReadingRead the passage individually and then discuss in pairs or groups.Its a good time to learn the new words and understand the meaning of the passage.Step 5 Call back the answers from the Ss1.It is to find if iron rusts in dry air,in airfree water or in ordinary water.2.We need some test tubes,test tube holder,cotton wool,oil and Bunsen burner.3.A week.4.We can take air out of water by boiling it.5. Because oil is lighter than water,it stays on the surface of water.Step 6 Learn the new words1.Ask the Ss to pick out the new words in Passage B. Write the words on the blackboard. 1 / 3rust,test tubes,nails,Bunsen burner,boil,ordinary2.Read the new words after you twice. Bring out the apparatus on the desk.Step 7 Careful readingT:Well.Now reread the passage carefully to further understand it. Then work in pairs to fill in the blanks on Page 45.Step 8 Language points1.Add some oil to the water. 在水中加點(diǎn)油。add sth. to sth. else Add some sugar to the soup.在湯里加點(diǎn)鹽。He planned to add a room to his house.他打算再擴(kuò)建一間屋子。Five added to ten makes fifteen.五加十等于十五。2.This will keep air out of the water.這會(huì)使空氣不進(jìn)入水中。keep.out of. 把擋在外面;不讓靠近The dog is smelly. Keep it out of the room.這狗身上很難聞，把它弄到屋子外面去。Keep out of the railroad track.請(qǐng)勿靠近鐵軌。3.Iron rusts in ordinary water.鐵在普通的水里會(huì)生銹。ordinary 一般的;普通的;平常的in ordinary dress 穿著便服ordinary work 平常的工作Step 9 PracticeComplete the sentences on P46,Part 5.Keys:1.nail2.does not rust3.boil;air4.oil;air5.iron; airStep 10 Assignment1.Do the experiment in groups of three after class.2.Report a similar experiment you have just done in the lab. Step 11 The design of the writing on the blackboardModule 5A Lesson in a LabThe Third Period1.Whats the aim of the experiment?2.What equipment do we need in order to do the experiment?3.How long does it take to see whether iron rusts in the three cases?4.How can we take the air out of water?5.How can oil prevent air entering water?rust,test tubes,nails,Bunsen burner,boil,ordinary add sth. to sth. else keep.out of. ordinaryStep 12 Activity and InquiryStepsStudents ActingTeachers Organizing1Complete the description involved in some careful reading for specific information (scanning)and reorganize the information.Remind the students how they usually write up scientific experiments.2Complete the description on their own,and then check their answers in pairs.Ask the students to complete the description on their own.3Give the answers.Play the recording again. 希望對(duì)大家有所幫助，多謝您的瀏覽！