Pick a publicly traded company you might be interested in learning more about throughout the semester. It could be a company you have seen on the news, a member of an industry you want to work in, or just a random choice.
Go to the company's website and find a copy of their most recent Form 10-K. This is the annual filing with the SEC that contains their financials and a whole lot of other information. For most companies, you can find the Form 10-K by going to the "investors" page, then "financials", then "SEC filings", then choosing the "annual items" option. I would suggest saving the pdf of the 10-K for future reference.