请认真阅读下列材料，并按要求作答。
Let’slearn
材料①
Thereisatreeinfrontofthehouse.
请根据上述材料完成下列任务：
(1)请简述什么是课堂操练。
(2)设计Presentation环节的教学活动，并对设计意图加以说明。
(3)设计Practice环节的教学活动(不少于2个)，并对设计意图加以说明。
(1)课堂操练是学生在理解新语言的语义、语境、语用形态之后，在教师指导下进行简单的运用训练。为了避免形式枯燥，教师也可借助一些实物、卡片、图片等创设情景，让学生在教师提供的真实情景下，运用新学到的单词、句子等进行简单交际。教师也可以设计一些游戏或其他有趣的教学活动，激发他们的学习兴趣，活动的设计要有目的性、灵活性、挑战性、全面性和参与性。 (2)Present.ion ①The teacher shows students pictures about dog and ball. (Teacher points the first picture)T：Where is the ball? (Students may answer in Chinese)Ss：在狗的前面。 T：Yes，we can say the ball is“in front of”the dog.“In front of”means“在……前面”.You can also say the blackboard is in front of you，the desk is in front of you.Can anyone give me an example? S1：Li Ming is in front ofme. S2：The tree is in front of our classroom. T：Great.So when I ask you where the ball is，you can answer“It’s in front of the dog”.(引入句型的讲授)Where is the blackboard? S3：It’s in front of me. T：Where is the tree? S4：It’s in front of the classroom. T：Yes，you all did a good job. Then the teacher uses the same way to teach the other words between，behind，and above. ②Listen to the radio The teacher lets the students listen the radio and read after it. ③Read after teacher The teacher asks students to read the new words，then lets them read after him/her. (设计意图：引导学生学习新的方位介词，并利用教材内容练习学生的听、说能力。) (3)Practice ①Listen and do One student gives guidance by using the new words;the other students do as the student commands. Teacher gives timely and specific feedback to students. ②Find and say Teacher asks students to look at the picture and work in paim. One student asks the other where the tree/house/chicken is.The student should give the right answers and ask a similar question according to the picture. While students are doing the activity，the teacher should walk around the classroom and listen to what the students are sayin9.Ⅱsome students are not doing the right task.the teacher should rectify.If some students find it difficult to do the activity，the teacher can give hints. (设计意图：通过练习，学生能够加深对方位介词的印象并且熟练使用方位介词。同时，学生能够使用方位介词进行简单的对话。)
