不管是申请哪个阶段留学，推荐信都是必需准备的文书材料，一般选择级别较高的老师/教授的书写。下面和出国留学网小编一起来看看美国留学推荐信书写指南。
首先来看看书写内容。
推荐人由下列各方面表达其对申请人的学业能力之看法：
a、以往的学业成就，包含考试成绩
b、目前之表现
c、学术潜力，例如日后考试成绩之推断
2、推荐人应就其所知之申请人能力表现，兴趣及人格给予评论，此应包括
a、英文说写能力
b、分析表达能力
c、个人特质，如进取心、独立性、自我激励、果断力等
d、创造力、想像力
e、可靠性及责任感(请就所了解的程度说明申请人所负责之职务)
f、兴趣之广泛性、包括参与活动和社会组织
g、社交能力和个人关系
3、申请人对所申请之课程的适用性及对选读科系之学习能力
申请人修完其课业后的生涯展望
如果是离校很久之成人申请者，推荐人可能很难就其学术能力给予评论。此时，可能提供申请个人能力与自我激励能力的看法，且说明其认为申请者可能应付学位课程的理由，其工作经历及推荐人对申请者之工作绩效也应包括在内。
接着来看看书写技巧。
1. 详实的个人材料夹
教授要写好一封推荐信，需要你提供详实的个人材料。即使在一所很小的大学里，每个教授一学期也要教许多学生。如果教授从你那仅仅得到是成绩单，那么在推荐信中他只能提到你这几年的学习成绩。如果你希望得到的是一封优秀的推荐信，那么你就需要整理出自己的个人材料，准备一个详尽的文件夹，并清楚的标明你的全名。你的个人材料文件夹需要包括以下材料：
1）成绩单（如果GPA在3.0至4.0之间，当然不错。）
2）简历。你的简历应突出你所参与的义工，和你选修的与申请的大学有关的课程。这样，你的教授便会较全面的了解你。如果这些他们都知道，那就不妨再提醒他们一次。
3）与之相关的表格等等，你都需要把他们一并放入相应的贴好邮票的信封内。
4）可能的话，最好附上官方的成绩单。
5）个人陈述和学业目标（半页纸）。听起来有点老套，但是仔细想想，教授们更喜欢有远大志向的学生。也就是说，一个学生如果没有明确的方向，会给你的教授留下不太好的印象。如果没有具体的实施步骤，也许你的教授会认为你还没有为将来的学习作好准备。
2. 提前预约见面时间
预约见面的最佳时间是在信发出前的两周，与你的教授预约依次简短会面，谈论一下推荐信的事情。记得一定要提前5分钟到达，并且着装要整洁。不必穿正装，但是一定要让别人看起来很舒服。从你的着装表明了你要谈较正式的问题。
同时，为你这次谈话作好充分准备。比方说怎样谈论你将来的计划；哪些是你学术上或者个人的擅长，哪些可以帮你实现你的目标，哪些又是有可能阻挡你实现目标的障碍，如果遇到障碍，你有哪些计划来克服困难等等。总之，要把这次会谈当作一次面试。让教授了解你为自己设置的目标，你的个人计划，当然不必谈你为达到目标已经取得了多大的成功。
最后，切记一定要避免在课上或者课后来讨论你的推荐信。无论如何，不能在信发出之前一天，把材料塞到教授手中。 要知道你很忙，你的教授更忙。急匆匆写出来的推荐信，效果一定不会太好。
3. 作好调研工作
一定要提前研究你所申请的学校。这样不仅会有利于你的应试申请，而且也向你的教授表明了你对那所大学是认真的。你想就读的大学学术氛围如何？学校的竞争程度、属于传统型，还是创新型？学者们喜欢那些知道应该谈论什么的人。
4. 征求建议
征求导师对于你学业的建议，这样你会把你们的关系拉近距离。大多数导师喜欢谈论他们自己领域的事情。事实上，他们很难发现人们是否真的对他们的学术领域感兴趣。举个例子，你对美国文学非常感兴趣，这将会使一些英语教授感到高兴。另外，如果你真的对某教授的课程感兴趣，那一定要告诉他，告诉他你是如何被他的课程所吸引的。
5. 学习他人
谈谈你是如何从你的朋友或者相关专业的毕业生那里学到的经验，学习他人也是大学教育的一个重要组成部分。比方说你避免了哪些错误？为什么你的朋友做对了？需要记住的是，大学是学习的经历。没有必要惧怕谈到自己所犯的错误。谈谈你班里班外的同学是如何学习的，学习他人，将给你带来无穷益处。
6. 发致谢涵
发致谢涵给帮你写推荐信的教授是必不可少的最后一步。教授不是奴隶，在会面之后，发一封感谢信给你的教
人们不可避免的在第一次时会犯一些错误，申请入大学时也不例外。尽管你没有4.0 GPA， 但是你仍然可以在成熟、责任感、雄心和良好的风度方面排在前列。你的推荐信成功的向你申请的大学传达了这一信息。当然这也是与你如何向你的推荐人成功的展现你的能力和个人资质分不开的。
最后带给大家一篇参考范文。
In capacity as Professor of Mathematics at Fudan University？I＇m writing to recommend Mr. Wang？Gesintosyour PhD program in Computer Science. I have known Mr. Wang since his sophomore year of college？and have acted as his thesis advisor and mentor. In my experience？he is a gifted and diligent student？and an admirably hard worker.
Wang is an impressive student because he has been forced to overcome the significant challenge of a serious illness during his freshman year. When I first met Wang in my Discrete Math class？he did not appear to be anything special to me. While his exam scores were good？they were not as high as I would now expect of him. What I didn＇t know then was that due to his illness？Wang was attempting to take all of the difficult early mathematics courses at one time？including Discrete Mathematics？Advanced Mathematics？Linear Algebra？and Possibilities. While most students found preparing for just one set of these exams difficult？Wang was overwhelmed by four of them. But in the end？he achieved an impressive score on the final exam？which made me conscious of his unusual determination he demonstrates when confronting difficult challenges.
Mr. Wang and I have often talked about a variety of mathematics and computer science concepts and problems. During these discussions？I always found him to be delightfully intelligent. Not only does he quickly understand the concepts and problems presented to him？he is able to analyze these problems and present solutions. But perhaps most important is that Wang＇s thinking is intensely rigorous. When looking at any question？he carefully scrutinizes it and if he finds any uncertain issues？he clears them up immediately. I believe this kind of thought is essential to become an excellent computer programmer.
Serving as his thesis advisor？I had a first-hand opportunity to observe the way in which Wang＇s mind works. In his senor thesis？Mr. Wang mainly discussed two challenging questions in regards to″ANN″. In our books in China？knowledge of ANN and its uses are very rare. Few people in China have studied this topic and consequently？the materials that are available on ANN are limited. Working on this difficult project？not only did Mr. Wang rise to the challenge？but he went above and beyond the call of duty to analyze his secondary sources and test them for accuracy in practice. In this way？he found mistakes in the book that we use. His diligence and hard work made me extremely proud of him.
Mr. Wang is an intelligent？motivated？and industrious individual. Teaching and advising him has been a delightful pleasure. I know that if given the chance to study abroad in America？he will arm himself to become a great programmer he dreams of being. He has the intelligence and background to achieve these goals - now all he needs is the opportunity. I ask that you look upon his application favorably and grant him a chance to study in your university.
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