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Schools should ask students to evaluate their teachers. Do you agree or disagree? Use specific reasons and examples to support your answer.
Introduction:
Universities in the United States have long had evaluations of teaching quality to help students make decisions as to which classes to take. It is no longer a question of whether or not schools should ask students to comment on their teachers’ work, but simply how and to what extent. As far as teaching quality is concerned, I fully support that the decision to require students to assess their teachers’ performance.
上面的段落作为手段，达到了上面所说的对手段的要求：第一句话交代了关于本文的话题—学生评价教师的背景信息，吸引读者的注意力;第二句话复述了题目，最后一句做了主题陈述。这样的开头可以满足ETS的高分标准。
另外一种开头常用语让步转折的结构中。复述题目并阐述理由，然后通过让步状语从句的句式表明作者主要观点，并暗示文章结构。这种写法同样非常适用于托福的开头段，同样是这个例子：
Universities usually require students to give a comprehensive evaluation based on different aspects such as sense of humor, clarity, carefulness, and patience. Therefore, teachers could keep improving their teaching quality given the feedback. Although some potential drawbacks might be inherent in such an approach, it is fair enough for students to assess their teachers’ teaching performance according to the following reasons and examples.
这个开头很简洁很清晰，第一句话叙述现在许多学校的做法，第二句话介绍这样做的好处，最后开头主题句采用让步从句的写法，首先承认学生评价老师表现存在一定的潜在坏处，但是这样做尤其合理性，观点例证在下文进行陈述。通过这样一个开头表明了文章的话题，同时表明了文章的观点，而且暗示了文章让步转折的结构，推荐大家使用。
开头主要锻炼能力：引出话题能力，复述原文的能力，清晰表达观点能力。引出话题可以让读者不会感到突兀，复述原文表明自己语言运用改写原句的能力，清晰表明自己观点给文章定下一个基调，让读者能够从开头就了解到作者的观点。