Knowing exactly what state your project is in is important.
You'll need to report on the progress of each assignment and summarize what's been completed so far. You should start keeping track of these as soon as you begin planning any project because chances are, you'll forget something or think of something completely different by the time the task is finished. If everything goes according to plan, then great! However, chances are good that you'll miss a deadline or a small detail will turn out to be more complicated than expected.