Answer:

Once you have completed your formal sentence outline, you will need to expand on that framework to create your expository essay. As much as you may be wanting to just get your ideas down and submit your paper, in order to make sure you are submitting a well-developed and strong essay, you need to make sure you are providing strong supporting ideas, developing paragraphs so they will fit together logically to best convince your reader, creating a strong introduction and conclusion, and revising your paper to catch issues you may have missed or not been aware of when writing.