Understand the assignment, and follow the directions provided by your instructor. If you have been given a document explaining and describing the assignment, keep that document with you while you are doing your research, and while you are reading and organizing your research material, and while you are writing and proofreading your final project.
You could do the most comprehensive and diligent research, and produce a wonderful project, but if it does not match what the instructor wants you to produce, you will not get the best grade.
Ask questions of your instructor, or of the librarians, if you do not clearly understand what you have been asked to do. Ask your questions before you have invested a lot of time and work!