These represent the most serious omission students regularly make.
Every essay or paper designed to be persuasive needs a paragraph at the very outset introducing both the subject at hand and the thesis which is being advanced.
The conclusion is a very important part of your essay.
Although it is sometimes treated as a roundup of all of the bits that didn’t fit into the paper earlier, it deserves better treatment than that!
Your conclusion should remind the reader of what your paper actually says!
The best conclusion will include a synthesis, not just a summary—instead of a mere list of your major points, the best conclusion will draw those points together and relate them to one another so that your reader can apply the information given in the essay.
This process of presentation and cross-examination is equivalent to the "body" of your essay.
Finally, end with a "closing statement"—that is, the conclusion of your essay—arguing as strongly as possible in favor of your client's case, namely, your theme. It's not a murder mystery, for instance, full of surprising plot twists or unexpected revelations. Instead, lay everything out ahead of time so the reader can follow your argument easily.
A good conclusion should do a few things: You've already spent time and energy crafting a solid thesis statement for your introduction, and if you've done your job right, your whole paper focuses on that thesis statement.
That's why it's so important to address the thesis in your conclusion!