运用英语教学法并结合自己的教学实践对下面的教学设计进行评价(用英语作答)。Content：AIDS Preparation：Divide the class．into two groups．Tell them there will be a competition between the two groups according to their levels，sex，locations in the classrooms or whatever．The members have to try to catch the chances to speak before the whole class by raising their hands．The student who raises his hand first can get the chance，then he can get one mark for his group．The competition lasts in the whole process of the class．At the end of the lesson，the winning group can get some gifts． Procedure：Step 1 Begin the class by talking with the students in a casual way，SO the students can feel relaxed．We can greet the students first，then turn to ask what they think the most terrible disease in the world is．Help them to say“AIDS”，then we come to the topic smoothly．In this way the teacher just tries to let the students not to think learning is a burden． Step 2 Tell them the competition，and the rules of the competition． Step 3 Fast reading．Get the students to read the passage about Aids quickly and then answerthe question：What is AidsThe first student who answers the question can get one mark． Step 4 Detailed reading．Ask the students to read the passage carefully，then answer some detailed questions like：What are the causes of the diseaseWhy is the disease SO terrible Step 5 Discussion：How should we treat the people who have diseaseThen some volunteers stand up and state what they think．Remember to give them marks． Step 6 Design work．Get the students to design some little posters which can remind people to be careful of AIDS．Give them some little cards to design on． Step 7 Collect the cards and give marks．Some good ones may be as follows： No drugs，no AIDS． Love condoms，love life． AIDS is a super disease． A condom a day keeps AIDS away． Step 8 Use the cards to form the pattern of the two words NO AIDS．So it can remind the students as well．At the end count the marks and give the gifts to the winning group．