The traditional essay format approach to writing

I can recognize a good piece of student writing when I see it. I know when it is well structured and has a well-developed argument but it is difficult to say exactly what I am looking for, let alone describe a good argument more fully. 

Introduction What is this essay going to be about  

Main body What are the themes that I am developing to support my argument  

Conclusion What are the consequences of what I have written  

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