Instead of sending your professor a draft of your paper before it is due, send them an outline of the paper.
Writing a research paper or doing a research project has to include synthesis, otherwise, you are just plagiarizing the work of others.
This is a youtube video from GCFLearnFree.org that explains the process of synthesis in an easy, digestible manner.
When synthesizing information, it really helps to refresh yourself on the evidence you have already collected. As you read, you will probably start to notice patterns in the evidence and concepts will start to form about how everything fits together.
Now that you have reread and organized your notes, it is time to take a step back. Give yourself some breathing room and return to your research question.
You might have already developed your thesis while you were organizing your notes, but if not, give yourself time to think and mull over the evidence and perspectives.
At this moment you may realize that you don't have enough evidence to make the argument you want to make, in which case return to step 3 in the process and find the missing information.
Writing an outline is one of the best ways to organize your thoughts and craft an effective argument. There are numerous ways to write an outline, but the methodology isn't as important as just doing the process. With that said, outlines usually include a thesis statement, sub-sections of the arguments, and evidence that supports those sub-sections. For a more in-depth discussion of how to outline and why you should outline, watch the video below.
This video from the University of British Columbia talks about the process of organizing notes, creating an outline, writing a research paper, and time management all with a delightful British accent.