Talk to an accountant. You may have to talk to more than one for this assignment. What you are looking for is:
A) How does a company manage its accounts payable?
B) How does a company manage its inventory?
C) How does a company manage its accounts receivable?
You are looking for specific working capital strategies like how often do they count inventory, what approach do they use in counting inventory, how do they make sure a customer pays a bill, or how do they make sure they pay their vendors. This can increase your knowledge of how this works for your company you work for, but it can be very informative for when you start a business. A PLUS will be if you include metrics that the accountant/business uses to measure these activities.