Unit Six: Predators,parasites and other Relationships Teaching objectives: To make students understand that predators not only include lions,wolves but also robins, oapnginaetiampeteaadasanhetgsgs their hosts. To help students understand the biological control:the use of predators and parasites to control the number of some pests. To make students understand that the close association between parasite and host is an example of ymbiosis To help students understand the importance ofecosystem's balance. To supply students with opportunities to practice their basic language skills 1.Pre-reading questions: Analyn thexampof oiaotosratethe imporance of coystem's balance. 3.Assignment ◆Review text i. ◆PreviewText II. Read Text II 2session Cthe suy ofTe Text I Workbook:p.94-Guided writing.p.99 TranslationA ation of the study of Text l Allow students some time to ask questions on the text. Askstudentsm up the min idea of the text. 9-Guided writing.p.9 Translation A. 3.Assignment ◆Review Unit6. Workbook:pp.101-107:Exercises V and VI1 Unit Six: Predators, parasites and other Relationships Teaching objectives:  To make students understand that predators not only include lions, wolves but also robins, frogs, and humans etc  To help students understand the relationship between predators and their preys, parasites and their hosts.  To help students understand the biological control: the use of predators and parasites to control the number of some pests.  To make students understand that the close association between parasite and host is an example of symbiosis.  To help students understand the importance of ecosystem’s balance.  To supply students with opportunities to practice their basic language skills. Time Allocation and Teaching Procedure: About 4 sessions (8 class hours) are needed for this unit. 1 st session 1. Pre-reading questions: Test students on the background reading materials and see if they know these terms: predator, parasite and ecosystem and the relationship between predators and their preys, parasites and their hosts. 2. Study of Text I: Ask students to sum up the main idea of the text. Analyzing the examples of biological control to illustrate the importance of ecosystem’s balance. 3.Assignment  Review Text I.  Preview Text II.  Read Text III. 2 nd session 1. Continuation of the study of Text I: Allow students some time to ask questions on the text. Focus on language points of the text. 2. Study of Text II Ask the students to explain why it is necessary to kill elephants in some areas. Focus on language points of Text II. 3.Assignment  Review Text II.  Workbook: p.94-Guided writing, p.99 Translation A. 3 rd session 1. Continuation of the study of Text II: Allow students some time to ask questions on the text. Ask students to sum up the main idea of the text. 2. Workbook: p.94 -Guided writing, p.99 Translation A. 3.Assignment  Review Unit 6.  Workbook: pp.101-107: Exercises V and VI