English 11 Synthesis Writing
Before we get into the details of synthesis writing, you might consider this link. It's one of the most thorough, detailed resources on synthesis writing you can keep with you through high school and university. Keep in mind, it is copyrighted material.

Ok here goes!

THE ARGUMENT SYNTHESIS: The purpose of an argument synthesis is for you to present your own point of view - supported, of course, by relevant facts, drawn from sources, and presented in a logical manner. The thesis of an argumentative essay is debatable. It makes a proposition about which reasonable people could disagree, and any two writers working with the same source materials could conceive of and support other, opposite theses.

HOW TO WRITE SYNTHESIS ESSAYS

1. Consider your purpose in writing. Read the topic assignment carefully. What are you trying to accomplish in your essay? How will this purpose shape the way you approach your sources? 
2. Select and carefully read your sources, according to your purpose. When rereading, label or underline the passages for main ideas, key terms, and any details you want to use in the synthesis. 
3. Formulate a thesis. Your thesis is the main idea that you want to present in your synthesis. It must be expressed as a complete sentence and include a statement of the topic and your assertion about that topic. Sometimes the thesis is the first sentence, but more often it is the final sentence of the first paragraph. 
4. Decide how you will use your source material and take notes. How will the information and the ideas in your sources help you to fulfill your purpose? Re-read your sources and write down the information from your sources that will best develop and support your thesis. 
5. Develop and organizational plan, according to your thesis. How will you arrange your material? 
6. Write the first draft of your synthesis, following your organizational plan. Be flexible with your plan, however, and allow yourself room to incorporate new ideas you discover as you write. 
7. Revise your synthesis. Insert transitional words and phrases where necessary. Integrate all quotations so they flow smoothly within your own sentences. 

TECHNIQUES FOR DEVELOPING SYNTHESIS ESSAYS
SUMMARY: The simplest - and least sophisticated - way of organizing a synthesis essay is to summarize your most relevant sources, one after the other, but generally with the most important source(s) last. The problem with this approach is that it reveals little or no independent thought on your part. Its main virtue is that it at least grounds your paper in relevant and specific evidence.

Summary can be useful - and sophisticated - if handled judiciously, selectively, and in combination with other techniques. At some time you may need to summarize a crucial source in some detail. At another point, you may wish to summarize a key section or paragraph of a source in a single sentence. Try to anticipate what your reader needs to know at any given point of your paper in order to comprehend or appreciate fully the point you are making.

EXAMPLE OR ILLUSTRATION: At one or more points in your paper, you may wish to refer to a particularly illuminating example or illustration from your source material. You might paraphrase this example (i.e., recount it, in some detail, in your own words), summarize it, or quote it directly from your source. In all these cases, of course, you would properly credit your source.

TWO (OR MORE) REASONS: The "two reasons" approach can be an extremely effective method of development. You simply state your thesis, then offer reasons why the statement is true, supported by evidence from your sources. You can advance as many reasons for the truth of your thesis as needed; but save the most important reason(s) for last, because the end of the paper is what will remain most clearly in the reader's mind.

STRAWMAN: When you use the strawman technique, you present an argument against your thesis, but immediately afterward you show that this argument is weak or flawed. The advantage of this technique is that you demonstrate your awareness of the other side of the argument and show that you are prepared to answer it. The strawman argument first presents an introduction and thesis, then the main opposing argument, a refutation of the opposing argument, and finally a positive argument.

CONCESSION: Like the strawman, the concession technique presents the opposing viewpoint, but it does not proceed to demolish the opposition. Instead, it concedes that the opposition has a valid point but that, even so, the positive argument is the stronger one. This method is particularly valuable when you know your reader holds the opposing view.

COMPARISON AND CONTRAST: Comparison and contrast techniques enable you to examine two subjects (or sources) in terms of one another. When you compare, you consider similarities. When you contrast, you consider differences. By comparing and contrasting, you perform a multifaceted analysis that often suggests subtleties that otherwise might not have come to your attention.

(Copyright Cassie Carter with significant edits / MSU, 2018)